Yep - exactly. He I think was trying to show his students that losing weight was just a calories in calories out equation but that nutrition was about more than that. He got a lot of press for the weight loss, but I understand that his whole point was to show his kids that there was more to good nutrition than just losing weight.
I think that the typical person who carries a few extra pounds is probably not the health disaster that doctors like us to think, and that the true issues lie with those who are really underweight and really overweight.