I think the hope of those that established the eat well plate is that once a 'standard's Type 2 has lost the weight, they will be able to increase their carbs a little as their insulin resistance will have diminished and their pancreas will still be healthy enough to produce insulin. And for the vast majority of Type 2s I believe this is probably true - but that doesn't mean they can go back to their previous portion size and it doesn't help those who didn't have insulin resistance in the first place.
Smidge
Smidge