I can't believe that more people think NO than YES. Duh, of course New England would have won with Drew Bledsoe, just as much as with Tom Brady perhaps.
1st- It was Drew Bledsoe that beat Pittsburgh to send them to the first Superbowl (not Tom Brady). Bledsoe was spectacular in that game, and single-handedly beat a Pittsburgh team that was beating the Patriots until Brady left.
2nd- Brady did NOT... I repeat, did NOT have a lot to do with the Superbowl wins either. Most overrated MVP EVER!!! Remember, it was all Viniateri. Sure, Brady didn't blow it... and there you may possibly have an argument against Bledsoe.
3rd- Bledsoe is a very streaky quarterback. When he is confident, he is one of the best in the league (yes better than Brady). It is when he loses his confidence, that he is nothing less than terrible. The Patriots, and their genius coaches, would have had Bledsoe keep his confidence, and he would have played supremely well.