And I have had excellent pizza (as well as Italian food) in Southern California. Which was kind of my oblique gripe, this regionalism BS is kind of, well BS. But, maybe some areas excel in general terms more than others with regards to certain cuisines. So sure, you can find excellent pizza on any corner in the 5 boroughs, but Mexican maybe not so much, but you can find it. I think it all comes down to one's upbringing. For instance, I was born and raised in Mpls, so where outside of Sweden are you going to find excellent lutefisk? Oh wait, nowhere, that shit is garbage
You'll have to name names ese...
The worst Mexican food I've ever eaten was in Thomasville, GA. That said you can find great BBQ there.