I live in Manhattan and know a lot of Jets fans. To me, the most interesting subtext in the current Jets story is that my friends tell me that a lot of Jets fans just don't like Sanchez all that much. The Jets' fan base is a blue-collar, suburban crowd and, so far, they are behind Mark because they have put their hopes on his shoulders, but they really aren't enthusiastic.
Rex is more their cup of tea (or, more aptly, keg of beer), but they also know he's a little embarrassing and that he's the kind of Coach they'd be mocking without pity if he were with a Divisional Rival and that they'll turn on him in a minute.
So, even the local support, while loud, is thin.