Those teams you mentioned - the Colts, Texans, Steelers and Bengals - have a huge advantage over the Chiefs. They aren't in year one of a new system installing a completely new offense, defense, etc.
We're an 8-8 team at best next year. 2014 we can start talking playoffs if Alex Smith isn't a disaster.
I also think the Chargers are a sleeper.
Alex Smith's career record when the opponent scores at least 24 points: 2-30-1