It's NOTHING to do with Brady himself. He's just another constructed version of a Bill B "yes man."
Why else do you think Cassel was so great in his time there (made playoffs) but horrible at the chiefs?
I'll say it again and again, it's his OL. They're fantastic. They give him all the time in the world and actually believe in him. (Something the Bucs are missing)
The BEST asset in all of Football (these days) is a good/great OL. They may not get the credit for it, but it IS what makes great teams great and allows for Brady to throw for 500 yards.
Do you even know what you are talking about? Cassel threw for 3,116 yards, completed 58% of his passes, had a 93 passer rating, threw for 27 touchdowns and only 7 interceptions last season... Get your facts straight dude...
Ok, so his overall stats @ the Cheifs is good? I mean, he wasn't bad last season, but the season before he was a big waste. I won't take anything away from his season last season, but overall I still don't think he's the answer for them. He's a Stafford is disguise, so I suppose "horrible" is a bit harsh, but he's not a savior of any kind. More like a one-hit wonder. Ask his team's fans what they think, I think you'll get the idea. Cassel's awesome six points he placed on the mighty Bills was impressive....
Also, he has a pair of good RB's, and one that is downright scary to any team taking a huge load off his shoulders. Btw, they combined for 2627 yards.
(And my bad, I forgot the Pats missed PO narrowly. It was an 11 win season for them and they are usually in PO.)
Either way, the conversation was about what makes Brady great, not Cassel. I stand firm that it's Brady's great OL (And Bill B himself) that makes their dynasty tick. However, there really is no way to know, because IF Brady is ever traded (or whatever) it would be hard to gauge from team to team, as most teams don't have that kind of OL to start with, and the "age" card will be played like it was with Favre by that time.