There is quite a lot of evidence that the faster you lose the weight, the more likely it is that there wll be rebound weight gain.
Off the top of my head (I will have a look for
a tragically amusing article I found a while back, that gives some of the stats):
Something like 90% of diets never achieve target weight.
Only 5% of dieters maintain the weight loss for any appreciable length of time.
Only 2% of dieters have not regained by 5 years
and
most regain ends up with the dieter becoming heavier than before they started the diet.
Heartbreaking, eh?
The most sustainable weight loss appears to be a modest loss that can be maintained over time, and slowly built upon.
Although these stats do come from the non-diabetic population, so I guess diabetics have more motivation, better tools (if they test) and more understanding of the consequences of weight re-gain, so I would expect better stats for diabetics than those quoted above. Plus, low carbing is going to help with avoiding carb frenzies and cravings, which are a major cause of weight gain.
Of course, the flip side is that weight regain is terribly easy for people with insulin resistance, and most of us start at a disadvantage - glucose and carb sensitivity
Anyway, I still like the ND for the opportunity that it offers, because when it works, it works brilliantly, and it is a lot more 'sensible' than most VLC rapid weight loss diets, but I think we should all be aware of our own tendencies and food habits before starting any diet - and factor those in for both during and after.
Me? I have spent 30+ years discovering my own body's reaction to food intake control, and I am DEFINITELY a the-slower-the-weight-loss-the-better kinda girl.
I rather like this article - except that he is, of course, selling his own Solve Everything Diet. Yawn.
http://drhyman.com/blog/2014/05/26/5-reasons-diets-fail-succeed/
Edited to add: just revisted that Cracked.com article, for the first time since the ND became so fashionable. Interesting snippet in one of the
quoted links! Apparently very low cal diets where the dieter loses significant amounts of weight are statistically more likely to maintain more weight loss over a 3 year period! Go ND! Very low calories diets saw 29% of total weight loss being maintained, compared with 17% for the 'Balanced' dieters. That means that both groups regained more than 60% of their weight loss within 3 years.
Also, since this data is from before Low Carb diets became so popular, there is no comparison with them... We obviously need more data!
Edited for clarity