I measure a QB, or any player for that matter, by them doing or not doing what needs to be done when it needs to be done. I'll take a guy who produces mediocre numbers, doesn't make critical mistakes, and finds ways to win over a stat monster who fails when all you need him to do is hold on.
The fact that he's coming off of an injury is irrelevant, what he does on the field is all that matters, if 09 Brady isn't as good as a different Brady his performance isn't magically altered by taking into account that he was injured, whatever his performance is, it is what it is.