Melanson's legit. He's got a black belt in judo (he's been in Karo Parysan's corner many times), extensive knowledge in catch, and a black belt in BJJ. I don't recall who awarded him his rank in BJJ, but Randy Couture hired him on as the head grappling coach at Extreme Couture, so it's safe to assume that he's credible. Forrest Griffin trains with both Melanson and Drysdale (I assume for a good reason, otherwise he'd just do all of his grappling at Drysdale's).