...I read a story where an extremely obese person ate nothing but potatoes for 8 months. He lost 120 pounds, which went a long way toward improving his health, eh?
Carbohydrates have a lower caloric value than fats, so that makes some sense. It is still a relatively unhealthy diet. Even the Atkins diet appears to be unhealthy if used as a long term regimen. Everyone has their opinion about what is the best, but the health.gov plan is the most balanced and sustainable IMHO.