Will Gadd has a long post about special performance diets for sports. I like these quotes from his article. Read the whole thing here.
“The Norwegians would win or place high in the ski race, eat a couple of boxes of Oreos for post-race recovery, have a beer, eat another huge dinner, and sleep 10 hours a night. The Americans would place mid-pack, recover with sports drinks, eat a ‘Pritikin’ (very little fat) dinner, sleep poorly, and not improve. The Americans would also obsess about vitamins, body fat, etc. The Norwegians won races, the Americans worried about their diets...”
“There are no magic bullets, no metabolic master blasters, etc. etc. Sorry, the guy who trains 30 hours a week and eats at McDonalds will destroy the guy who trains five hours a week and eats a perfect Paleo diet. If Paleo boy steps his training up to 30 hours a week then he may be able to compete with McDonald's boy, but even then I'd bet that the skills, quality training time and attitude would still kick Paleo Boy's ass...”