TA's diet protocol spits in the face of the low GI approach, I take long breaks off gear, 6 months at a time and longer, so my conclusion is based on normal unassisted hormonal levels. When I eat reasonable and keep my GI stable by avoiding sugars and fruits and sticking with brown rice and the like with low fat and clean proteins, I maintain very well my bf stays sub 10% and my shape keeps in comparison to when I was at my peak in cycle (bare in mind I'm a low dose pusher 1ml test+1ml mast once a week is my protocol)
However, usually around 3 months later I slip up and start indulging, although my calory intake is even lower as Im eating less frequently, I lose muscle definition and the waist line starts to look like shit.
The above happens and has been a yearly occurence in my life for the past 15 years....based on this, I do not believe a calorie is a calorie. I could eat 3000cals a day derived from brown rice and grilled chicken, for 3 months and be leaner and bigger than if I ate 2400cals derived from bananas, whiskey and coated sugar with deep fried cat fish and french fries.
I'm not trying to be disrespcetful here, I just strongly disagree with that theory and I think many who might follow it will end up dissapointed and wasting their time. Not only that, it is not a healthy recommendation...low fat, controleld GI is far healthier.