I used to know an NBA scout (guy played in the old Eastern league).
The year Bradley came out he showed me the "scout" tape. As we watched he noted "he moves quick for a big guy" and I responded, yeah, but he doesn't move quick for an NBA player. We agreed the guy was a huge risk, but he said (correctly) he would be picked higher than he should do to his height and potential. I believe he was scouting for the pistons then and knew Bradley wouldn't be there when they picked.