Six-Day Ultra-Marathon on a Caveman Diet?

http://storify.com/paleodietplanet/six-marathons-in-six-days-on-a-paleo-diet
Six-Day Ultra-Marathon on a Caveman Diet?
Crossfit athlete Tom Wyles is UK-based athlete who has taken part in a number of Ironman-level triathlons and marathons. In contending for the Marathon des Sables, he also made the determination to change from the conventional fast-acting carb gels and shakes he had counted on in previous events to a more paleo-based diet approach with increased fat and protein.