I don't know the terminology and all, but Bookout does not throw the shot the same way top flight throwers do. He doesn't do the full spin and throw, he just twist's (basically puts his back to the field) and throws it. When I was at OU I asked him about it and he said he'd have to learn the common technique or he probably wouldn't be able to get to the top. I don't know if he has changed the motion or not, just commenting on why/how he will/won't get the extra 7-8 feet he needs.
Also he did not throw the discuss because he had the shoulder surgeries and that puts a lot of stress on the joint and ligaments the doctors were concerned about. He wanted to throw it, but the coaches wouldn't let him. He thought at the time he could get to the really elite level in the discuss, but this was 3 or 4 years ago so who knows.