Thing is, though, Bostonian rude is a selfish rude, NYC rude is more of a cultural art form.
And when 9/11 happened, people were helping strangers. They might be rude, but if someone hits them, they all become "just New Yorkers", and someone messed with THEIR city. The big power failure also didn't result in riots, but instead a lot of cookouts and impromptu street concerts. It's "their city", and while I don't admire the politics, I have to admire that. They do have a certain level of toughness. It's a dirty, harsh city in parts, and they love it anyway, and survive there.
Boston? I have a feeling that a 9/11 there, something smacking into the Prudential tower, would be more like mass panic and shoving and people stepping on each other, just looking out for themselves. Places like Cambridge, the populace would just be utterly helpless and whine for the government to help them. There's a selfishness, but none of the toughness of NYC.