The thing is, there's a lot that goes on with the brain in kids. I know when you're really young (like 1-2), a lot of your mental "specialisations" occur (ie. your brain begins to adapt to its surrounds to deal with those types of things). An example being we can easily tell the difference between thousands of different faces, although they're very much alike. Animal faces (monkies for example) have just as much variety as ours, but we can't tell the difference because our brains become specialised in human face recognition.
Anyway, my point is, I wonder when that stops? If it continues for a good few more years, perhaps a kid like this can specialise his brain to be more adept at that kinda of hand eye coordination than any adult could? So later on, drum coordination would be so in-build into his brains processes, that he could do some mad things?
Bit of a tangent. Ignoring all that. Crazy skills!!!
Edit: Almost forgot too. Here's the thing though. Will he be able to outdo Tony Royster Jr, who's considered an elite prodigy? You decide! Here's him when he was 12!
http://www.youtube.com/watch?v=ktWF-WiQIOw