For some more thoughts on this check out pro triathlete Gordo Byrn's articles. He is a strict Paleo diet athlete. However, he has had extensive conversations with Dr. Cordain about how paleo falls apart a bit for endurance athletes. Gordo, guided by Dr. Cordain, recommends some adjustments to paleo to suit endurance athletes. It is a reasonable approach and has served Gordo well.
www.coachgordo.com (W/F/S)