Oh, wow, so this has devolved into another Manning vs Brady debate, huh?
Well, then I'll give my take:
I wouldn't call either the greatest of all time. Manning has struggled in the postseason. Brady has struggled in the postseason ever since the Patriots had to stop taping other teams' signs.
Both are great. Peyton is great like Jimi Hendrix was great. He redefines the way his position is played and makes it wholly his own. You take him out of the equation and everything falls apart. Brady is more like Keith Richards. He's a superb craftsman and he may have more hits, but alot of that is what is around him (the head coach, the organization, the defense, etc.).
I am happy Peyton got the record today, simply because I feel he deserves it. If you'll recall the year Tom Brady got the record, it was really just the result of the Patriots runing up the score, being up by 35 points and still throwing bombs to Moss all year long.