I hate the Colts so much I am routing for the Jets for only the third time in 40 years (once vs Oakland at the end of 2001, and once against Miami at the end of 2008). But as much as I hate the Colts, I have to admit Manning has been supreb this year. Without him the Colts would be medicore and I expect them to win the superbowl. They would have gone 19-0 except for Polian, and for that I thank the little turd. Manning would have gotten the 19-0 job done and we would have had Hoosier Goobers on this board for years.
That's a pretty bold assumption a) given they tanked the last two games, so we'll never know b) given Manning's history of postseason failure.
And as for how they would have fared against the Jets & Bills had they tried, who knows? The only other AFCE team they faced (aside from us, who had the weakest pass defense in our division) was Miami, and it took a small miracle for them to beat the Phins. For the week 16 game, contrary to popular belief, the Jets were still in that game, Manning was not having his way with them, and there's no telling the Jets wouldn't run over a tired Colts defense as the game went on anyway. We'll find out this Sunday. I think it's still a longshot, but it's not as if the Jets were completely overmatched in every phase.
As for the Colts being mediocre without Manning, well, sure, if his replacement is Curtis Painter, yeah, they'd suck. If they had Matt Cassel, I think you'd see a similar thing as the Patriots in 2008 when they had a strong enough roster to still be a solid team. But that Colts team still has Reggie Wayne, Dallas Clark, Addai, etc. a great offensive line, and a defense that made timely big plays. The Colts won 4 out of their 14 games scoring 20 points or less (the 16-0 Patriots only scored 20 or less ONCE in the regular season) and a few of the Colts wins were predicated on huge defensive plays.
To say Manning carries that team is partially a reflection on how awful their backup is, and is a disservice to what is otherwise a stacked roster. I don't think you could say Manning makes the Colts any better than Rivers makes the Chargers, Brees makes the Saints or Brady makes the Pats. Or, again, reluctantly, as Favre makes the Vikings. I don't think Manning deserved the MVP this season. I don't think Brady deserved it either. I would've given it to Brees or Rivers.