No, I don't think it's true. "Low" gluten intake was a bit under 4 grams. Google puts gluten in bread at 11-15 percent, so that's 44-66 grams of bread. Not low enough to spare people who are celiac or wheat sensitive. And there's not guarantee that what people ate instead of the wheat was any better for them than wheat. For instance--take somebody eating ten slices of wheat bread a day, and no sugar. Replace half the bread calories with sugar. Wheat went down, I'd say probability of diabetes went up.