But then, the UK has a similar phenomenon, with sophisticated Londoners making the same complaints about England's own flyover country, "the North" [1]
But it was the same when I lived in a mid-sized town in the mid-west US. People were much more friendly and inviting. Randomly striking up a conversation (small talk) was usually quite well received.
I’ve had the opposite experience. Strangers routinely strike up conversations with me when I’m in New York, Boston, Chicago. Last time I was waiting for a friend at a bar, and there was baseball on TV. Some old man sitting next to me turned to me and started telling me about the time he got something signed by Babe Ruth. As a foreigner I’m totally used to it of course, but I’m also cognizant of the fact that it is out of the ordinary in American standards.
She and I met back in the day through her boyfriend at the time (interestingly, we're still friends - he lives in town and we see him regularly). And she met him through her college roommate, freshman year.