Quarterbacks, as we've seen in recent NFL drafts, get selected earlier than expected because the position is so important.
Only one quarterback plays, as opposed to the rest of a team—excluding kickers and punters. And NFL teams can't afford to miss when taking a prospect, or risk waiting and letting another team make the pick.
The 2013 NFL draft regarding signal-callers, though, has a different feel than what we saw in 2012, since quarterbacks going No. 1 and 2 overall is unlikely. Matt Barkley of USC is certainly expected to be a first-rounder and rightfully so, because he has improved with each season and possessed first round talent last draft.
Barkley passed on the draft last season, deciding to come back to USC for his senior year, and still remains a top gunslinger. This season is not has top-heavy as 2012, so it'll be interesting where Barkley and the best quarterbacks land.