I'm in 225, which is right next to where they are at 226. They definitely all came at the same time, although I'm not sure if that was because the club made them or because they met up by themselves or what not. Their section was filled before any of the others near us, though. And from what I saw they had free roam of Yankee Stadium. There were chants back and forth (a lot of people yelling that Boston sucks or Ny sucks) but I didn't see one bit of hostility between either groups of fans, which is great.
Yeah, that's how it should be. It just creates a better atmosphere.