Louis,
We could go round and round on this, I'm going to use Peyton as an example and then I am done.
In 2003, the Colts came up here and played the Patriots in the AFCCG; the Patriots were underdogs to the high powered Colts, but Peyton threw four pics (one in the end zone to kill a go ahead drive) and the Colts lost.
In 2004, the Colts set all kinds of scoring records, they came back up here in the divisional playoff round and although their D held the Patriots to 20 points, the Colts lost as Peyton and the offense put up a whopping 3 points. Three points on a defense that was without two of their starters in the secondary I might add.
In 2005, the Patriots got knocked off by Denver, clearing the way for the then #1 seed Colts to march to the Super Bowl, they of the 14-2 record (they flirted with an undefeated season that year); the result was a home playoff loss to the wild card Steelers, with a rookie QB at the helm. Taking nothing away from the Steelers as they played well, but once again Peyton could not get the job done.
In 2006, the Colts hosted the AFCCG at home vs the Patriots and after throwing a God awful pick to Asante Samuel (and good luck next week too by the way; Mr Manning, meet Mr Samuel, he of the clutch INT's in the playoffs, just ask the Vikings today), the Colts were down 21-6 at the half. In the second half, Peyton finally played like a clutch QB and rallied the Colts to a win and a Super Bowl title. During the Colts march to the Super Bowl, Peyton threw 3 TDs and 7 INT's but no matter, the 10,000 pound gorilla was finally off Peytons back.
That was until last year; once again, the Colts marched through the regular season, hosted San Diego and lost at home in the second round of the playoffs.
This year, after a 3-4 start, the Colts ripped off 9 wins in a row to finish 12-4 as the hottest team in the NFL, the pick by most of the talking heads to go to the Super Bowl from the AFC and what happened; they lost to the 8-8 Chargers.
Are all of those losses squarely on the shoulders of Peyton? No, of course not. BUT, clutch QB's do what they have to in order to put their team in a position to win. He does it during the regular season, but in the playoffs, history shows he does not.
You'd take Manning and Marino because of their stats; good for you. I'll take Terry Bradshaw, he of the not one, not two, not three, but FOUR Super Bowl wins, perhaps the greatest clutch QB of all time. Terry was M-O-N-E-Y.
And to your arguement of not having a running game or a D; hate to break it to you, but most pro QB could win with a great running game and/or a great defense, so I don't get your point really.
Again, you see it the way you do, I see it the way I do, so let's just end it there.