I doubt. My husband had Type 2, he tried diet, exercise, he's getting worse. Oh, I have to admit that he's a business man, super busy, under pressure, he didn't strictly follow the diet or exercise plan. A strict diet/gym plan is very tough to follow, that's what I want to express.
I do a lot of reading every day since I really hope to stay with my hus until we're very very old. Recently, some reseaches state that disorder in circadian rhythm is a major risk to Type 2 diabetes. That's exactly what my husband being doing in the past 15 years, he worked until the next morning, frequently. I guess that's it. I'm trying to get him sleep early, but that's also tough, since he's on biz trip all the time.