The guy that held the Packers hostage, a team that is basically an institution in the NFL, is humble? Or when he publicly argues with the head coach on playcalling? Where have have you been for the past five years? In Brett Favre's butthole?
The guy is a giant diva.
As for his statistics, again, any competent starter could have seen the same boost and then some, because y'know, they'd be actually good. Favre has been mediocre for years, so if you think he magically got better behind a great offensive line, throwing to talented receivers and handing off to the second-best running back in the game because of some magical Christ-like talent, you should stop watching football.