Some stuff for you to read:
Low Grain and Carbohydrate Diets Treat Hypoglycemia, Heart Disease, Diabetes Cancer and Nearly ALL Chronic Illness.
Diet and Exercise Reduces Risk of Diabetes
Even Mildly Elevated Blood Sugar Increases Risk for Diabetes
Insulin and Its Metabolic Effects
Also...if you do a little research, you'll find that Chromium helps to regulate blood sugar levels, so how much chromium was in the food he ate will also affect readings.