A Clark quote from here: http://www.defeatdiabetes.org/Articles/diet030710.htm

The ADA, however, remains firm in its stance. "A diet that is very low in carbohydrates is significantly higher in protein and in fat, and there are specific risks to people with diabetes from high-protein diets in regard to kidney disease and from high-fat diets in regard to cardiovascular disease," Clark says. The ADA is far from alone in its position. "We recommend that 45 to 60 percent of calories come from carbs," says Karen Chalmers, director of nutrition services at the Joslin Diabetes Center in Boston.

Dr. Clark appears to want it both ways.