Most people I've met who grew up outside of New England have said that people here seem to be angry, sarcastic, rude and generally have a great distrust of outsiders. I would say that's pretty accurate.
Well, I self-describe as ugly, surly, and stinky, so...
As to New England (or the Northeast generally) and its culture versus Outside:
I posted in another thread a tale from my final iteration of grad school, before finally coming to my senses about academe. Here's another:
That aforementioned Big Ten university is in the Midwest. My first inkling that Something's Different came the first time I drove out to see the place. That was back before the days of cell phones, when you had to find a payphone and use a "Calling Card" (lots of digits to dial) to call home and charge it back to your account. When finished dialing all of those digits, the friendly recorded operator would say, "Thank you for using AT&T!"
...EXCEPT in Ohio. There it was: "Thank. You. For using... A... T... and Teeee."
Anyway, we're about halfway through that first semester at the university in question. I'm a TA in a weeder course. Everybody does the formal end-of-semester course evaluation. Because that's too late to make corrections if things are going sideways in the current iteration, places I'd been previously instituted an _informal_ evaluation mid-semester: while the formal eval trickles down through the hierarchy (dean, then department, then your supervisor, then, finally, you), these we get to see immediately. "Take out a blank piece of paper - DO NOT put your names on these." We'd ask some generic questions about the class and their experience: "3 things you like about the class, 3 things you hate, 3 strategies you'd give a friend to succeed, ..." leave the room and get a volunteer to collect them and stuff them into an envelope.
That semester we had something like twenty sections of that weeder, over a staff of a dozen. We all thought it was a Good Idea (including our supervisor, the faculty member who was the lead instructor), and did it. All the TAs got great reviews... except the SpaceCritter. It appears I was the biggest bastard these kids had ever seen.
Fellow TAs sat in on recitations and labs; lead instructor sat in on recitations and labs. Yep, I'm doing everything correctly. And, of course, _I'm_ the one who suggested doing this exercise in the first place.
We're sitting around the grad lab in our department, puzzled, when another guy from our department speaks up, and says, "I know what the problem is."
We look at him. "Well, Mark, we'd love to hear it."
"You're from Connecticut."
"??!?"
"I had a roommate once from Connecticut. It took me six months to realize he wasn't an a**h***."
He went on to explain: "Your vocal inflections, your mannerisms, your choice of words... they're interpreted by us here as VERY AGGRESSIVE."
That same year was Seinfeld's heyday: we had guys in our department with the show's bass riffs as their system sounds. After several long conversations with colleagues, I found a major difference: they loved the show because they considered it totally ridiculous - nobody would actually act like that. Any of us growing up in the Northeast - especially the NY metropolitan area - thought it was funny cuz it's TRUE.
Postscript: years later, a (CT) colleague had her company bought out by a Midwest conglomerate, and they relocated her to the mothership. They sent her to one of those team-building training things. She's (physically) big, but very reserved while OTOH very bubbly: think a young Julia Child. After that training exercise, she called me: she practically had one guy in tears! And all she did was have an idea about how to solve their exercise problem, and gave it in her usually bubbly fashion.