Very surprising I have to say, you hear about New York's rudeness quite often.

I think generally cities are more forgiving at least, if you get some villagers to hate you, you can just as well move away, in a city it's not as bad as there are many people around and city people are used to meeting a lot of different characters unlike villagers. I'd call that a general trend partly supported by my own experience though I'm not an american obviously.

In that context I also found it surprising to hear that some villages in the southern US are apparently very friendly places.