I wouldn't draft Morris Claiborne with the belief he's going to become a shutdown CB. I didn't think him or Peterson played the position with any type of intuition at LSU. In Peterson's case though I thought his talent would make up for his lack of instinct, it obviously did not. With Claiborne being a less talented and a lower scorer than Peterson in the academics department, I wouldn't draft him unless I was in need of a good kick returner.
i don't really think wonderlic has a huge bearing on how good these guys will be. chances are they will be a bit slow picking things up, but i expect peterson to play much better the next couple seasons. u can't teach speed, but u can practice playing corner.