Yeah, Jeff is on the ball about this stuff. He knows Mangini pretty well so I would take his word on it for sure.
In a way, my technique is similar to Mangini's I believe because a lot of the motion I exert comes solely from the wrist itself and the fingers just provide additional assistance. I also have this shiver motion that Jeff is talking about. I can move my wrist without having anything in my hand - it will literally shiver and it looks very strange for the person watching. (lol)
What I've noticed about my technique is that I spent a lot of time emphasizing the free stroke. For instance, when I was working on my single strokes I wouldn't just tap the pad with my stick and that was it, I would
really snap the stick and emphasize the free stroke and it would come bouncing back with such tremendous force and I think that explains why I have this shivering motion.
For those who don't know what I'm talking about then watch this and you'll see what I mean:
http://www.youtube.com/watch?v=egID8WnPvaI
Tom