It is important to understand what a well formulated low carb diet means. I track protein, carbs and net carbs after fiber. I have targets for each. Fat is mostly from good oils like olive oil.
http://www.amazon.com/Art-Science-Low-Carbohydrate-Living/dp...
The study seems flawed. Low carb diets assert that you need to be keto adapted. That can take weeks. It took about 3 weeks for me. And there may be other benefits of keto adapted diets: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2367001/
[1]: https://www.amazon.com/Art-Science-Low-Carbohydrate-Living/d...
[2]: https://www.amazon.com/Art-Science-Low-Carbohydrate-Performa...