Not that the workout is the end all, but this does not surprise me one bit and I always thought it was funny so many had him as the unquestioned best back.
He is a solid, durable, and unexciting back. He isn't even as good as Steven Jackson. Yet all of these "experts" had him going #2 to Miami. It is not going to happen. I think he is a lock to fall to the middle of the first and probably lower.
There is no compelling reason to take the guy any higher.