Considering I've had in-ring training with Joey Matthews (Mercury) and Mike Mondo, who are/were OVW stars, I think it's safe for me to say that it isn't OVW. They are being trained by Dean Malenko, Lance Storm (or was, I don't remember if he is still there), and William Regal.
I learned more from Mondo and Matthews in a few days then I did in a whole month under Whipwreck (no offense to him). And they only taught me a little bit from what they knew.
So yeah, it's being called up too early that is the problem. Not OVW.