Seriously, there are only so many variables in explaining how folks get fatter, and eating more has to be part of the equation. Not clear on why this had to be a topic of research other than it is a hot-button issue.
Here's a potential white-hot issue I'd love to see someone tackle: Did the entry of women into the workforce cause America to get fat? Have we failed to find replacements for the traditional housewife's roles of dietician and short-order cook? Have we simply forgotten how to eat and cook?
Beats me, my microwave burrito is done.