There is an increase, if not an epidemic, of childhood obesity in the U.S. Some people think this will lead to an increase in Type 2 Diabetes. Some have even said this is already happening, and this claim has been made in the media.
The Junkfood Science lady points out that there is very reliable data on the incidence of Type 2 diabetes among U.S. children, and the incidence is not increasing. The studies that seem to indicate the contrary are very limited and partial--basically confined to a small number of children who were already going to a doctor or the hospital. Increase in obesity? Yes. In Type 2 diabetes? No, at least not so far.