I'd agree that there's a big dropoff after Revis and Hall. I think that Josh Wilson will be a strong pro and a solid draft pick, but maybe not a true #1 corner. And McCauley has the tools but is a walking question mark. Of course, somebody else will eventually emerge in the NFL -- A Jonathan Wade or Courtney Brown, perhaps -- but I wouldn't risk a 1st on any of them.
It's been interesting watching Chris Houston's dramatic arc over the course of the draft season. He wasn't talked about as a 1st-round talent until his amazing combine. After that he started popping up in every round-1 mock, with whispers like "challenging to be the first CB off the board." Now those whispers are dying down, and you start to read things like this from Rob Rang a few days ago:
Houston is another big-name player who scouts have begun to question a bit as they are able to distance themselves from the Combine and review more film....Scouts for some teams drafting in the late first round and looking for cornerback help, are giving Houston second- or even third-round grades. Most often, the comments scouts have is that while Houston is physically blessed, his lack of instincts and playmaking skills (only three interceptions of 22 passes defensed) make him a surprising liability. Scouts are also quick to point out that Houston is among the least willing of the draft's top cornerbacks in run support....
http://cbs.sportsline.com/nfl/story/10130884