I think Steelers fans below are understimating his talent

The majority of mock drafts I read in the two weeks leading up to the draft had him being picked well before #20, with a good chunk having him at #10 or #11 (Broncos/Bengals).

Colbert has only traded up in the first round twice: for Troy Polamalu and Santonio Holmes. That should say something about the regard they held him in.

The knock on this draft is that the talent fell off after the top 9-10, but was deep on 2nd/3rd round caliber picks. The Steelers may have gotten one of the top 10 players, and one of their 3rd round picks (from the Raiders) is high enough in that round to be equivalent to a late 2nd round pick. They'll be fine.