Well, I'm in the camp that you can't judge QB's solely off playoff wins and losses, but you can on playoff and big game performances. If a QB throws ints in these big games it says something about them.
I don't judge Bart Starr, Joe Montana on just playoff w's, but I do on how they performed in those games. This is my one big knock on Brett Favre. As much as I loved the guy, he had major brain cramps in some really big games. Great QB, well, great regular season QB. He was an average playoff QB. In GB you took the Great with the not so great and still loved having him on the team.
Brees hasn't even shown he is an average QB in big/playoff games. Unlike Nuke, I think he can, but he hasn't so far.
Brees needs to come up mistake free in these games.