I'm not entirely convinced as to the accuracy of the advertisement on page six, here.... Well, I'm only through one article.
As for obesity, I've always been of the opinion [http://frontal-lobe.net/?p=40] that calling it a "war" or "epidemic" casts a certain urgency on the issue that just isn't there. Children aside (which, I realize, makes this rant less relevant in the context of the article), being obese is something that a person does to him/herself. Your neighbor being fat has nothing to do with you being (or not being) fat, aside from a common influence that you may respond to differently.
Calling it an epidemic just makes me wonder, "Why? Are you afraid of catching it?" Calling it a war just seems like a "merciful" gesture to absolve people of responsibility for their own health problems. Barring crippling injury, being fit is a matter of willpower, period. Genes and circumstances might make it easier or harder, but nothing can make it automatic or impossible.
If they choose to employ their willpower to a different end than their health, why should I care? All it means for me is bigger helpings are available at restaurants and wider seats in the theater.
As for children, my stance is largely the same: parents take responsibility for their kids, up until the point where the kids decide things on their own, the transitional period to which coincidentally tends to occur at the same point that they are physiologically best suited to become fit.
That being said, studies like this are always a good thing, and bully for the kids who're participating in it.