Of course, fruits and veg are bright and shiny and colorful and highly photogenic. You never see a pile of wheatberries, or a big pyramid of flour or cane sugar, or a bowl full of corn syrup.
I think someone should do a photo shoot reflecting the raw materials in an average American's daily diet. There's something vaguely resembling an interesting infographic contained in a blog here, but I can't trace it back to the origin. And what's all that dairy doing there, in a population that allegedly doesn't drink milk anymore? I think, also, that the chart should be corrected for water content, as a pound of lettuce has a lot fewer calories (less than 100) than a pound of sugar (almost 2000).
I'm just ranting today, especially since I've been reading a lot of dietary studies, and am highly skeptical of many of them. Too small a population, too short a time, too much averaging. While you don't want to look at individual data points necessarily, they can indicate interesting things. For example, on a study of mice who had access to different % fat diets, there were individual mice on a 6% fat diet who had a body composition of 25% fat, while there were individuals on a 75% fat diet who had a body composition of 10% fat. Scroll through a bit. So while you can make general, sweeping conclusions, it's still important to check out the raw data. After all, I'm an individual, not an average.