I've heard that it's showing up in young people these days; in their 20's. The one article I read on it, and if I can recall where it was I'll see about looking it up, was done by someone who looked at different groups of people. One thing he noticed is that the Amish, who eat a pretty much typical Western diet, have a very low type 2 diabetes rate. Along with that, he noticed that you NEVER (according to him) see a fat Amish child. He suspected that there was some correlation between childhood obesity and early onset of Type 2 diabetes. He also thought their much more active lifestyle helped fight it.
Actually the Amish mostly grow their own food. They eat the typical dairy/butter/animal fat-rich diet our forefathers ate. To my knowledge they eat little or no modern junk food (canola, soy, white flour, etc). And they get plenty of exercise.
A more active life style helps as it boosts the immune system. But a lack of cocacola helps too. The Amish eat organic foods, and do not buy a lot of soda pop. Phophosphoric Acid and high sugar is a particulary bad combination that breeds Candida intestinaly.