I think a restaurant can be crappy even if the owners are from the country whose food they make. I watch enough of Gordon Ramsey's Kitchen Nightmares to know, LOL
It's easy to cut corners and make crap. But yes whether it's accurate or not, I tend to assume if the cooks and owners are from the country whose food they're making, that it's going to be better.
We have hardly any ethnic food in our area. We can go to Providence or Boston for that, but it's sort of a pain to drive for half an hour to an hour just to go to dinner. DH isn't really into ethnic food anyway, although he has come a long way since I met him.