OP found no correlation
Reviews are the worse way to test this hypothesis except all the others.
I honestly hate this take, sure, it might be the best (easily available, broad enough thing), but it's not my point, I'm not shutting this down, but giving a remark on what kind of drawbacks should be considered when analysing this, not because it's probably the best you should assume it's perfect.
That's not skew. That accurately reflects "non-native" clients, who are people too.
> a high concentration of americans will typically result in junk food scoring too high
You do realize that America has the highest number of Michelin-starred restaurants per capita? Way to stereotype
> high scoring asian food in the west tastes nothing like what it should
Are you also going to criticize Japan for not making American BBQ like "what it should"?
You're showing yourself to be extremely prejudiced against all sorts of other nationalities, and against the creative outcomes when nationalities mix. But people have different tastes from whatever you think is "right", and that's OK.
How did you find this data? A quick google says that France has about 630 Michelin restaurants and the US about 230 (and obviously fewer people live in France). It looks like Switzerland has the highest per capita with 143 for about 9 million people. The US has a lot of good eating places, but let's stick to facts.