Tom Brady was often getting less than 2 seconds to get rid of the ball, I will cut him some slack there. Wes Welker wasn't on the field to help him burn some blitzes and back the defenses off, I will cut him some slack there.
That said, he is not the Tom Brady we all are used to. Most likely, this will be temporary, bu temporary could be an all season long issue. he is not as confident in the pocket as he has been in previous years. this didn't start this year though, this started in the 2nd half of the Super Bowl vs. the Giants, and was carrying over into the first game of last season when he went down.