The PRIMARY reason?? Easily Rex.
Changed this teams culture and attitude and did more with less then Mangini ever did with those players. And I say less because they went from Favre to Sanchez. His exotic/blitzing defense worked and confused the hell out of teams and turned Revis into an all pro.
We just need to build this offense and things will be fine. Jets finally won't be in cap hell and should be able to sign some solid FAs to actually help this team.
Fat, boisterous Rex >>> Skinny, "PC" Rex