This is not news, although everybody is talking about it because it is in The Times: How a Low-Carb Diet Might Help You Maintain a Healthy Weight - Adults who cut carbohydrates from their diets and replaced them with fat sharply increased their metabolisms.
Not only that, but we now know that dietary fat appears to have minimal to no correlation with cardiovascular disease in normal people. We do know that being even mildly overweight is a significant risk factor for cardiovascular disease (along with breast cancer, arthritis, diabetes, Alzheimer's, etc etc.).
Addendum: If you are working on body-building with heavy weights 4 days/wk (few if any of our readers are doing that), you need to eat a lot of everything you can get your hands on just to maintain your weight, and even more to build muscle mass.