You might have a point if Dungy didn't have a long history of under coaching in the playoffs. Their playoff loss this year wasn't significantly different in their performance than their playoff loss last year, or the year before, or for the Bucs while Dungy was in Tampa. Some coaches just aren't playoff coaches, and while I like Dungy, and respect him, and felt a certain kinship with him because I lost a good friend the same day his son died, he has established himself as not a playoff coach.
And that really used to be the knock on Cowher, as well -- that his coaching style didn't work in the playoffs. He was more flexible this year, and the results showed. Hopefully, Dungy will learn, and we'll see a PIT/IND AFC championship game next year that is a lot less ugly than the conference semi was this year.