"There are no essential carbohydrates, even for athletes"but has since softened his stance based on personal experience - see:
"2% or 20% carb, no difference observed"and most recently, he writes:
"My own view on the ratio of carbs in the diet should be pretty clear by now.........I think a wide range is tolerable for those with normal metabolism. For those about to ask "how wide" - OK, let's say 5% to 40% or even more if you can tolerate it and the rest of your food is very high quality. If your metabolism is damaged (you know who you are - type II or obesity prone) or you don't tolerate starches well like me, you should probably stay on the low end of carb intake."