If that were true, and the food pyramid was this disaster, you'd expect the kids of the well-educated middle class to be fatter and the kids of parentally negle

If that were true, and the food pyramid was this disaster, you'd expect the kids of the well-educated middle class to be fatter and the kids of parentally neglected kids to be thinner. If it's not like that, probably other factors were a lot more important than the food pyramid.