You don't seem to be addressing inflammabl's contention. Of course this assumes that I know what he's getting at, but...

I don't think he's questioning whether a low carb or even a ketogenic diet has the benefits shown in the data you're posting. The question is, are the benefits dependent on the level of ketosis itself? There are studies showing benefit of ketone supplementation itself, but natural ketosis comes with other things, the decrease in carbohydrate itself, the increase in blood free fatty acids, lower insulin, etc. that could themselves be factors, direct effects of ketosis aren't isolated there. Even with epilepsy, somewhat less ketogenic approaches such as Modified Atkins seem to be as effective as the strictest ketogenic plans, for a lot of kids. Even if a kid does better on a stricter diet vs. Modified Atkins--they'll get there mostly by restricting protein. Do they do better because ketones are higher? Or because protein is a little lower?