That's one of the things I've been trying to urge caution on about Luck. Even if he's very good, the odds that he's going to be as good as Peyton are not high. The odds that one team drafts two all time greats at QB consecutively, ending up with 25+ years of star level QB play? Astronomical.
Then, the other side of that coin is to remember that you don't have to have an all time great QB to win a title. You have to have an all time great TEAM.
What the Colts are doing is like walking up to the roulette table and betting it all on double zero.