Status quo meals in Norway and France are pretty decent, I suspect. I've spent some time living in France and that certainly seemed to be the case. Status quo meals in the US? Terrible. The average American eats poorly - incredibly poorly - and it shows; in our health, waistlines, and, of course, in our school lunches.
So the real challenge is to move the needle on American food culture. School lunches can and should be one vector for effecting that change, but we need to recognize and tackle the bigger picture. As others have mentioned, proper regulations on marketing to children is a must.