High fat ketogenic hasn't really worked for me for weight-loss, either--except once when I first went on Atkins. After reading the chapter on the fat fast, I didn't do a fat fast, but leaned more heavily on fat. That was when I experienced electrolyte issues, and ended up going off the diet with a big pot of boiled potatoes.
Except for that time, I've never emphasized fat like I am now. But my "get-real," eat-to-appetite without purposely restricting calories weight seems to be about ten pounds lower with this approach than with the more protein-liberal, blueberries and cream approach I've mostly used in the past. Even though I've been a moderate low-carb zealot for something like ten years, it was still surprising to me that when I had smaller amounts of ten or eighteen percent cream with blueberries, that seems to have been more fattening than when I just eat the heavy cream by itself, with a little sweetener.
So still good for maintenance. I suspect it would be good for weight loss--but I'd probably have to put on a bit of weight first, to find out.
Dr Westman is willing to associate with Jimmy Moore--by extension, that means he's willing to associate, if not agree with, just about anybody in the health/nutrition field...
If you want a real low-carb zealot, there's Dr. Rosedale... he suggests using fermentable fibers that we can't digest at all. There are inulin supplements on the market that fit the bill, and if you look at the studies, resistant starch doesn't seem to have anything on inulin... One thing Rosedale suggested when Jimmy interviewed him recently was that people try to find out the effect of resistant starch on their insulin. I've seen type II's or just insulin resistant types report benefits to their blood glucose with resistant starch. According to Rosedale, he's seen type I diabetics who had to cover their resistant starch with extra insulin.