Worse. Boston fans are even worse than New York fans if you can believe it.
We have friends who just recently moved to Houston from Boston, and this is true in the guy's case. He won't let anybody watch the Pats with him, which I guess is considerate, but I can only imagine the words his four-year-old hears screaming through the locked door.
And he's ruthless when arguing about sports. When the Sox came to town last year, I was joking around about how the Astros were going to sweep or whatever. He says something to the effect of, have the Astros ever been relevant? What, like the time they were swept in the WS? Then he says something about that 'roider Bagwell (but this is just to piss me off).
He's a cocksucker as a sports fan, but otherwise a genuinely nice, considerate and generous person.
My son "buys" his son Astros gear for every holiday.