I think Super Bowl wins are overrated simply because most quarterbacks don't even get a chance to play in the Super Bowl. And even for the ones that do if your looking at it like, "well he lost 2 Super Bowls", I don't feel that you can judge a QB based on wins/losses considering that is a team stat. I mean if the Bears won in 2006 would people say that Grossman is better than Cutler? Now in the case of guys like Aikman, Montana, Brady, Bradshaw, and Big Ben, that have won multiple rings, I still think that they should get credit, actually a lot of credit, but that isn't a stat that should be used against a QB when comparing stats. Almost like player of the week awards, but on a much smaller scale, you wouldn't say well my QB is better than yours because mine won player of the week and yours didn't.
Now as far as Playoffs go, I think it is an ok way to evaluate a QB, just because in most cases (excluding Bears vs Seahawks) it is a way to see how the QB does against a playoff defense. I think It is just a way to see if he is "the real deal" If his playoff numbers are pretty consistent with his regular season averages, it is obvious that you have a guy that isn't phased by the pressure. It seems though nobody ever wants to give QBs credit for winning games, only want to criticize for losing. Coming into this post season, everyone was talking about how Rodgers has lost a playoff game, yet nobody mentioned how he passed for 4 touchdowns and rushed for 1. All they were saying is that he chokes in the playoffs, while nobody mentioned that "Matty Ice" was also 0-1 in the playoffs.
The other thing that I feel is overrated is "clutch". Rodgers has taken us to the end zone to get us the lead in the 4th quarter plenty of times, but defense lets him down sometimes. While we do not have a good record in games decided by 3 points or less, that can't all be put on Rodgers shoulders. In those types of games, it basically comes down to who has the ball last. The team we have, and the QB that we have doesn't usually put our selves in close game situations. We haven't trailed by 7 all season, and usually we have a comfortable lead, forcing the opposing team to play catch up, which helps our defense excel when the QB tries to force one.