US average consumption is not an appropriate comaprison, because the general US average would cover all age demographics. Older people tend to eat less. It's

US average consumption is not an appropriate comaprison, because the general US average would cover all age demographics. Older people tend to eat less. It's also true that people tend to self-report lower than they really consume. But that isn't exactly earth-shattering news to scientists who work in the field. They know about it & know how to adjust their interpretations of the research accordingly.