It's no big deal in terms of the OL. It's not like they're hidden gems or anything. Ferguson probably would've been a top 5 pick last year had he come out early.
Williams does look good, doesn't he? I'm tellin' ya, the Terps have put some pretty good defensive talent in the NFL recently, counting him, Randy Starks (an up and comer on the Titans' DL), EJ Henderson (injury plagued, but still solid), Kris Jenkins (ditto), and, most recently, Shawne Merriman.