New Jersey is absolutely in the Yankee's traditional area.
But you should see the number of Yankees fans around here.
You know, being a Yankees fan is easy, since they are pretty much guaranteed to make a deep playoff run. So for a guy in, say, Milwaukee to be a Yankees fan is laziness. It's hard to be a Brewers fan (I'm not one, because it's too hard) or a Cubs fan or whatever fan.
It's like it's easy to be a Pats fan. Because they always win. Or a Cowboys fan in the mid-90s. You know who has the best fans? The Lions. Imagine how hard it is to be a fan of a team that hasn't been to a championship game since 1957.