Well,
You are right. I don't think Ding will argue that he only has 1 release. If you have seen him bowl, I believe there isn't really much he can vary his release anyway. But mostly he is more concerned with free swings and shoulder posture, and most recently, speed control. A very important aspect too.
I'll be one to admit that I have not more than 2 "practiced" releases myself, one with more speed and one with more "under" the ball. Therefore I still use a plastic for corner spares (rather than those who break their wrist here using their strike ball). I also am trying to work on speed control (as per Deamon the guru's advice) rather than manufacture releases I can't master just yet. Not really at that skill level!
![Neutral Neutral](/images/emoticons/classic/icon_neutral.gif)