How about checking out a video with Wolfie and the boys playing, you can see it here at IGBlog. Mind you, quality is a bit **** so you can't really tell.

I just finished reading the Van Halen Saga - Everybody wants some and in that Eddie says that Wolfgang is a very good drummer as well as guitarist and bass player and that he has already recorded a load of material at 5150. Interesting! If anyone wants a brief review I've posted one on my site today here and don't tell me I'm spamming, its relevant! :)