I agree. This guy's claims are flatly contradicted by world evidence. As I've posted here before, the Japanese diet derives half its calories from rice, and well over 70% from carbohydrates in general. Two generations ago, it was nearly 70% just from rice. As many know, the Japanese live longer and have fewer "life-style diseases" than anyone else.

Korea, Hong Kong and Taiwan are similar, both in terms of diet and in exception life expectancy as compared to economic development. All around the world, there's a pretty consistent relationship between groups of big protein eaters and big people. Americans get more calories of protein than anybody else and are fatter than anyone else. Mexicans and British are close behind in both categories.

Furthermore, research on high vs low protein diets has been pretty conclusive: http://news.ycombinator.com/item?id=613745