Prevalence of diabetes going up

There was a scary article the other day about the rising prevalence of diabetes:

Diabetes may affect as many as 1 in 3 Americans by 2050

Really?  A third of the population?  That is INSANE.  C'mon people — lay off the fast food and the soda, and get off the couch once in a while!

Of course, I know that not all type 2 diabetics (what the article is primarily talking about) are diabetic because of diet and lack of exercise.  But those factors are responsible for many cases of type 2 diabetes, and certainly for much of the rise in diabetes.  Our American lifestyle has got to change, and fast, if we don't want a third of our population to be diabetic in 40 years.