Indy used 3 QB's that season and were terrible with all of them because the QB's weren't very good and the team around them stunk. They were able to prepare an entire offseason without Manning and things went horribly wrong because that team was dependent on a franchise QB to have any chance. Most teams will struggle without their starter but most "solid" teams can stay afloat for awhile with their backup. Take last season for example Foles went down and Philly was able to win some games with Mark Sanchez who was looked at as a joke in NY. Philly beat the Cowboys in a blowout with Sanchez on Thanksgiving. Green Bay lost Rodgers for a few games in 2013 and were able to win a couple of games including against the Cowboys with Matt Flynn. Flynn chewed up the Cowboys defense with 4 TD's but once he left Green Bay for less talented teams he's looked average at best.
Josh McCown who replaced an injured Jay Culter a couple of years ago helped keep the Bears afloat and torched the Cowboys but once he left for Tampa he looked like crap on that team. Matt Cassel looked terrific with a talented NE team around him in 08 as he subbed for an injured Tom Brady. He looked so good leading the Pats to an 11-5 record that KC gave up a #2 for him and he flopped because of the lack of talent in KC. When Luck arrived in Indy they had an aging Reggie Wayne at WR and no running game which prompted the Colts to throw away a #1 on Trent Richardson the following year. Once you get past Luck the Colts wouldn't win 4-5 games with Matt Flynn, Matt Cassel or a Josh McCown.
What you are implying is Luck in his rookie year was as good as Peyton where Luck can take a "bad" 2-14 team and make them go 11-5. That is furthest from the truth.
Luck is better than the scrub QB they had in 2011, but any average QB could have done better with that team.
Luck is a good QB but people think he is some elite QB that played well in bunch of playoff games. He's been very average at best in the playoffs. QBR of 70 and 12 INT to only 9 TDS and only 56% completion rate. Few games he has won was due to his defense holding the opposing teams to 10 and 13 points.
Comparing that to Romo's playoff stats, Romo performed better ( 93 QBR,
2 INTS, 8 TD, 61% completion rate).
They both played 6 playoff games and Romo has 2 wins vs 3 because his defense has given up 21 or more points in those games.
Had it not been the dumb reversal of Dez's catch or if our defense could have held up little better against a one legged Rodgers, Romo too would have led his team to the conference game last year.
This is what is ridiculous about how people talk about Romo and Luck. People make it sound like Romo's this INT machine in the playoffs and Luck is this elite can do nothing wrong QB. Yet it's Luck who threw 12 INTS where Romo only threw 2 INTS in the same number of games.