What I saw was that except for Ecuador and Africa, everyone had about the same amount of food, just very different things. The families with tons of veggies and fruit spent a good deal less than the junk food/alchohol families. A lot of the difference is also the cost of food. Things cost more in America and Europe than anywhere else.
The sizes of the families were different for sure. But you could see the difference in the way they looked. The Italian and American children looked far healthier than their african and ecuadorian counter-parts.
I do not think this article is what you seem to imgine, a blatant display of american consumerism or some such thing. I think it is very telling of the economic differences between our countries, and shows the effect that more balanced diets have on our health.
The only thing this article would make me "think about" is giving more money to help feed people in third world countries. Was that your point in posting it? If so, fine, that is a legitimate reason.