I took a beta of his program at Infineon this last Tuesday, and even in beta form it was brilliant.
I previously did what a lot of people do -- I make changes when it hurts. When I know that something isn't right. This workshop makes you stop accepting "okay" and trains you to recognize how the bike is responding. Dave said it teaches you "Vocabulary". I would expand that to say it teaches you "Muscle Vocabulary" or something like that. It teaches your body, not your brain.
Every, EVERY person at this seminar ended up with a lot more information about their bike. And every one of us ended up finding settings that we liked a whole lot better than the ones we started the day on. And none of us thought our suspension was off when we started. It's educational, useful and utterly necessary. Go do it.
He's planning on charging less than $100 per person (a lot less), and it's worth a lot more. It's worth every penny at twice the price.