You're right. I was talking more about the weight loss, I kind of wrote that post terribly. Everything that Ive read shows that while insulin response and fasting may have some physiological benefits (which will vary wildly from person to person) in addition to the low GI foods making it easier to stay on a diet because you feel full longer and more energetic all day the benefits of simply not eating too much calories is universal.

You can absolutely have a diet based on high GI, calorie dense food and still lose weight. But its going to suck.