Those really ugly agility numbers make me think this is mostly OTA hype.
If there's one thing we should all know by now, it's that camp reporters don't know what they're looking at and/or only go on a couple of flashy plays that might be against terrible QBs or WRs.
The Richard Sherman style of playing CB does not require the same type of agility as the Darrelle Revis style.
The scheme is setup for the Richard Sherman style of CB play.
If Sherman had been forced to play the Revis style, we wouldn't even know his name at this point.
Length does offset limited quickness if used correctly.
We saw David Irving have success almost purely because of his length. He didn't have the quickness to even make a roster if he had been 6-1 with 32" arms.