Dr Taylor says in the question sectinon at the end of one of his talks, that it seems to make no real difference how fast the fat is lost, and that people who are not uisng very low colorie, seem to get on better with low carb diets, then "moderate" low fat diets. I think the issue is that a lot of the diabetic drugs along with our own insulin production makes it very hard for us to lose weight while our BG is high.
Very Low Colorie solves this problem by getting BG towards normal levels within a week of starting it, low carb solves this probelm by giving the body little to make glocose from, intermittant fasting works by haveing times of lower BG.
Once someone is no longer diabatic, high BG are not an issue, hence to keep the weight off it mostly comes down to how much someone eats and what exercise they do. Low carb then has no magic apart from people seem to find it easyer to count carbs then colories, and tend to stick it ot better. (However I tend to think a few 23hr fasts a month will be the best option for me.)
The real magic of low carb is that I could see the result on my BG each time I had a carb free meal, this gives hope and hence motivation. Most people have tried to lose weight on "moderate" low fat diets in the past and have failed many times (otherwise they would not have Type2), so telling someone to do the same thing again is pointless as they know it will fail.
The magtic of Very Low Colorie is that is gives very quick results and by the end of the 1st week the improvment is clear, and that motivates people.
Remember that Dr Taylor resaerch is all about proving the process (twin cycle) that couses Type2, he is only reversing cases of Type2 so it can monitor what is going one, and hence work backwards to see what triggers Type2 in the first place. He does not clam to have studies the best way to reverse Type2, but has proved 100% that it can be done.