I see many fans on TV that shout loud they are always the best and will be. I don't know if media always shows you want you want to see or what they want you to see, so is it media's fault that NY is always listed as snobby?
The Yankees are all that, and more - if you're a New Yorker. New Yorkers, to my mind, have always been 'different', sort of out there and they are a charismatic lot, very loud and brash. The Yankees are good, and both the team and the fans want the world to know it.