...used to be posted in detail on his website - not sure if they still are. Haven't been there in a long time. I've seen one of his videos (an old one), and it actually had a lot of solid tradeable tips on it. My impression is that he's a good technician and trader, and got really lucky during the competition - the markets were moving right, so he went all out with high-risk trades...
But yeah, I've read Gallacher's book, and it definitely debunks the Robbin's Cup thing - whether Williams was a party to the deception or not I don't know, but they were advertising Williams as the winner and pimping his product before the contest was half over.
But in my opinion, he's definitely better than most of the other salesmen-guru types out there.