Oslo ratings are a little flatter. Phnom Penh is more concentrated at the top.
A practical test of Dag’s hypothesis using 115 visible Google Maps restaurant cards plus cross-cultural review research. The result supports a weaker version of the theory — but Google’s hidden star histograms stop this from being a clean proof.
Median 4.6; 13.8% at 4.8+.
Median 4.7; 40.4% at 4.8+.
Welch t≈2.47; Cohen’s d≈0.46. Small-to-medium, not definitive.
Verdict
Mostly yes, but not in the strong “1-to-5 histogram” form. In the Google Maps cards I could access, Phnom Penh restaurants cluster more heavily in the 4.8–4.9 zone than Oslo. Oslo has more 4.4–4.5 listings and a lower mean. That is consistent with a top-end positivity / reluctance-to-criticise pattern.
The caveat: Google Maps did not expose full per-place 1/2/3/4/5-star histograms in this signed-out session, only average ratings on listing cards. So this measures restaurant-level rating compression, not the exact distribution of individual reviews.
Important caveat
Phnom Penh Google Maps reviews are likely not “Cambodian-only.” Tourists, expats, restaurant staff solicitation, and language/platform choice all affect the sample. A Phnom Penh Maps average is a mixed-population signal, not a clean Khmer cultural survey.
Oslo distribution
Phnom Penh distribution
What the numbers say
Phnom Penh has about three times the share of restaurants at 4.8–4.9.
Oslo has more visibly “merely good” listings: 31.0% at 4.5 or below vs 22.8% in Phnom Penh.
Both samples are top-compressed; Google Maps restaurant ratings rarely show true low averages in either city.
What I could not prove from Google Maps
The original theory is about individual reviewers: Europeans spread 1–5, Cambodians mostly post when very happy. Google Maps’ public page currently hides the per-place histogram from this environment. I tested the rendered Maps pages and the internal place JSON for a sample listing; the accessible data included the average rating but not the 1–5-star counts.
This matters because two restaurants can both be 4.7 with very different shapes: many 5s plus a few angry 1s, or mostly 4s and 5s. The current result is therefore an ecological clue, not a proof of individual review psychology.
What outside research adds
Cross-cultural review research supports the general idea that star ratings are culturally and platform dependent. Wan & Nakayama found restaurant review star distributions differ across China, Japan, and the U.S.; China was the most extreme/J-shaped among their examples, while Japan was unusually non-extreme. Google also makes reviews public and non-anonymous, which strengthens the plausibility of face-saving / reputational concerns in contexts where public criticism is socially sensitive.
Raw restaurants checked
Visible Google Maps cards from “restaurants” / “best restaurants” queries, deduped by name. Ratings are Google Maps card ratings as displayed in the browser.
| Oslo restaurant | Google Maps rating |
|---|---|
| Tabuno | 5.0 |
| About Contrasts Oslo | 4.9 |
| Dil Se Indian kitchen N Bar Oslo | 4.8 |
| Hos Thea | 4.8 |
| Sabi Omakase Oslo | 4.8 |
| Stallen | 4.8 |
| Statholdergaarden | 4.8 |
| Varemottaket | 4.8 |
| Bønder i Byen Grünerløkka | 4.7 |
| Chez Colin | 4.7 |
| Credo restaurant | 4.7 |
| Le Benjamin bar & bistro | 4.7 |
| Maaemo | 4.7 |
| Mehfel restaurant | 4.7 |
| Mr. Bowl Oslo | 4.7 |
| Pilestredet parkservering | 4.7 |
| Punk Royale Oslo | 4.7 |
| Restaurant FAN | 4.7 |
| Restaurant Kontrast | 4.7 |
| Savage | 4.7 |
| Smia galleri | 4.7 |
| Statholderens mat og vinkjeller | 4.7 |
| Sultan Oslo food & sweets | 4.7 |
| The Salmon | 4.7 |
| Brasserie France | 4.6 |
| Castello Restaurant - Oslo | 4.6 |
| Code Restaurant Oslo | 4.6 |
| Den Glade Gris | 4.6 |
| Gazakjøkken | 4.6 |
| Helt Vilt | 4.6 |
| Indian Street Food & Co | 4.6 |
| La Mayor | 4.6 |
| Mon Oncle | 4.6 |
| Nordvegan | 4.6 |
| Pastis Bistrobar | 4.6 |
| Piazza Italia | 4.6 |
| Rugantino Oslo | 4.6 |
| Seaport Restaurant | 4.6 |
| Vaaghals | 4.6 |
| Yokoso Restaurant Aker Brygge | 4.6 |
| Arakataka | 4.5 |
| Basso Social - Oslo | 4.5 |
| Brasserie Rivoli | 4.5 |
| Elias mat & sånt | 4.5 |
| Kverneriet Majorstuen | 4.5 |
| Mathallen Oslo | 4.5 |
| Riviera Restaurant & Bar | 4.5 |
| STOCK Restaurant | 4.5 |
| Vintage Kitchen AS | 4.5 |
| Vulkanfisk | 4.5 |
| Way Down South | 4.5 |
| Brasilia Oslo | 4.4 |
| Festningen | 4.4 |
| La Villa Restaurant | 4.4 |
| Nedre Foss Gård | 4.4 |
| Oslo Street Food | 4.4 |
| KUMI Oslobukta | 4.3 |
| Südøst Restaurant | 4.2 |
| Phnom Penh restaurant | Google Maps rating |
|---|---|
| Blossom Restaurant | 4.9 |
| GēGē Kitchen Boeung Keng Kang | 4.9 |
| Old Durbar Restaurant BKK1 | 4.9 |
| Phnom Penh Three Rivers Restaurant | 4.9 |
| Shindi Georgian Cuisine Phnom Penh | 4.9 |
| TaSahin Hostel & Restaurant -តាសាហ៊ីន | 4.9 |
| Temari Japanese Restaurant | 4.9 |
| Above Eleven Phnom Penh | 4.8 |
| Baldwin's Bistro | 4.8 |
| Banteay Srey Restaurant | 4.8 |
| BÚN - Vietnamese Kitchen (Langka Lane) | 4.8 |
| CHINGU Cafe Phnom Penh | 4.8 |
| Ebinosekai Cambodia | 4.8 |
| Element - Vegetarian / Vegan Restaurant - Phnom Penh | 4.8 |
| Gorkha Palace Phnom Penh Indian and Nepalese Restaurant | 4.8 |
| HoubHoub Cambodian Restaurant (BKK1) | 4.8 |
| Kengkong Restaurant | 4.8 |
| Khmer Women' Food | 4.8 |
| Pépé Bistro | 4.8 |
| Riverview Restaurant & Bar | 4.8 |
| Ruby Jack Phnom Penh - Restaurant | 4.8 |
| SWAGAT Indian Restaurant | 4.8 |
| Wild Phnom Penh | 4.8 |
| AURA - Phnom Penh | 4.7 |
| Boma | 4.7 |
| Cuisine Wat Damnak- Phnom Penh | 4.7 |
| DO FORNI | 4.7 |
| HighGround Sky Bar | 4.7 |
| Hummus House | 4.7 |
| Hybrid Kitchen | 4.7 |
| Le Langka | 4.7 |
| Ox Club Restaurant | 4.7 |
| Trattoria Bello | 4.7 |
| Waterlink Bistro Lounge | 4.7 |
| 306 Wagyu Steakhouse | 4.6 |
| Armand's | 4.6 |
| Bistrot de la Poste | 4.6 |
| Elia Greek Kitchen Bassac Lane | 4.6 |
| Garage Sale | 4.6 |
| Kravanh Restaurant | 4.6 |
| Mauu! (Langka Lane) | 4.6 |
| Mesa Restaurant – Phnom Penh | 4.6 |
| Scenery SkyBar & Restaurant Phnom Penh | 4.6 |
| Soup Kruosar Phnom Penh | 4.6 |
| Bouchon Wine Bar | 4.5 |
| Friends the Restaurant | 4.5 |
| Kabbas Restaurant | 4.5 |
| Khéma Restaurant - Pasteur | 4.5 |
| Kraya Angkor Restaurant | 4.5 |
| La Volpaia - Phnom Penh | 4.5 |
| Mealea Restaurant | 4.5 |
| Sookdal Korean Restaurant(Phnom Penh) | 4.5 |
| Topaz Restaurant - Norodom Blvd | 4.5 |
| La Croisette | 4.4 |
| Makila Restaurant | 4.4 |
| Oskar Bistro Phnom Penh | 4.4 |
| Digby's Phnom Penh | 4.3 |
Sources and evidence notes
Reviews and ratings are public, non-anonymous, and moderated; ratings can be posted with or without text.
Cross-cultural restaurant-review study: Japan/China/U.S. star distributions differ; China was most extreme/J-shaped, Japan more unimodal.
Culture affects online purchase information and complaint behavior; collectivist and high-PDI contexts can handle negative feedback differently.
Cambodian etiquette emphasizes maintaining face, avoiding public anger/frustration, and resolving conflict indirectly.
Google Maps restaurant ratings are compressed high; platform averages and hidden distributions make raw star numbers fragile.
Signed-out Google Maps result cards for restaurants/best restaurants in Oslo and Phnom Penh, captured 2026-06-06 UTC.
Bottom line
Dag’s theory is directionally plausible. The Google Maps field check shows Phnom Penh restaurant ratings are more top-heavy than Oslo’s, and the cultural/review literature says rating behavior is not universal. But the clean test would need individual review histograms or scraped full review samples, ideally separating locals, expats, tourists, language, and restaurant category.