In every draft, the first 5-6 picks are usually consensus guys that everyone agrees on. After that, team boards are all over the place, so one guy's reach is just another's value pick.
The whole Mel Kiper-ization of the draft has been what's caused fans to worry about "oh, that's a reach!" Most team draft boards, I suspect, are pretty fluid right up to the last week, with some guy's that have been over-hyped for months sliding downward and others quitely sliding up under the radar.
When a guy the draft guru's peg as the 20-30th best prospect goes at 10-15, they cry "reach!" But if he's a good player that fits a team scheme/need, we should be happy and tell Mel/McShay etc. to pound salt...