I don't know; we'll have to wait for him to go to another team.
Actually, the better response is, "I know Tom Brady and Matt Cassel is no Tom Brady."
So I've heard; I just haven't seen. I'll give him credit for this - he's not turning the ball over. I agree that this is improvement. Beyond that, exactly what part of his game is "progressing"? Is he:
- make better line adjustments?
- reading the defense pre-snap better?
- making better and more decisive decisions after the snap?
- reading the defense better post-snap?
- better at avoiding the sack?
- making better intermediate throws?
- making better long throws?
- throwing the ball away better?
- running the ball better when the play has broken down?
Matt Cassel has always hit the short throws pretty well; not too much room for improvement there.
Seriously, I hear people say that he's improving. What I see is that the play calling is changing to do what he can already do (throw the short passes), not that Cassel is getting better at being a more well-rounded QB.
Don't get me wrong; improvement at not turning the ball over is very important in this offense and on this team. But that's about the only area I can honestly credit him with noticable improvement at this point.