The link t the study is not working for me.
As for very respectable scientists not endorsing a low carb diet, I think this is a result of a bottom-up approach to nutrition. Trying to make up an ideal dietary/lifestyle regime from the existing punctual evidence we have today and the limited understanding we still have about human physiology makes nutrition look like an extremely complex puzzle.
A Top-down approach, on the other hand, makes much more sense to me. If we keep the big picture in mind, treat humans as any other animal, exclude neolithic foods and experiment with macronutrient ratios in an attempt to simulate ancient conditions, determining our "ideal diet and lifestyle" looks infinitely easier.
It is easy to fall into a "Diet of the Gaps" style of argumentation when it comes to discussing low-carb diets. The reality is that research tends to increasingly support a Primal diet and lifestyle, to the surprise of CW-based researchers and almost boredom of the Primal community.