I agree with fruit, he seemed to contradict himself since he praises foods with low GI, but ostracizes fruit.
His counter argument for the lack of sustainability for this diet is the "cheat day" but I haven't found that to be effective at all with sustaining the diet.
Except there's evidence that the soluble fiber in fruit helps moderate the fructose absorption in your gut (this is completely separate from the GI index, which is about how it affects your blood sugar levels). Unfortunately a lot of studies only look at macronutrients in isolation and ignore the (for example, vitamin C help calcium absorption).
