I was thinking that the countries not present on the list perhaps have other scourges to worry about, rather than those that we (in modern society) suffer with; over-abundance of food, sedentary lifestyle, over-prescription of pharmaceuticals, etc.
As for the French... I like their approach; quality over quantity. I'd love to try a proper 18 course meal, which ironically is not that big - but certainly full of variety.
As for the non-english speaking countries, it does make sense that they wouldn't appear on the list... I hadn't even thought of that one.