Hmm, this was rather an interesting study, I thought. Here is the article. Both the low-carb diet variants (which were for only 2 days a week) did better than the low-calorie Mediterranean diet alone (7 days a week). Interesting! However, even more interesting is that it helped to keep calories in check with a low-carb diet as well - it was more effective. Guess that makes sense! What surprises me though is that 2 days of low-carbing was enough to lose weight.
However, one should be aware that there are low-carb Mediterranean diets by Dr. Steve Parker who wrote 2 books, the Low-Carb Mediterranean Diet and the Advanced Mediterranean Diet; now these diets are bound to be even better - i.e. low-carb and a Mediterranean diet combined - that is superior!
"Harvie and her colleagues compared three diets during four months for effects on weight loss and blood markers of breast cancer risk among 115 women with a family history of breast cancer. They randomly assigned patients to one of the following diets: a calorie-restricted, low-carbohydrate diet for two days per week; an "ad lib" low-carbohydrate diet in which patients were permitted to eat unlimited protein and healthy fats, such as lean meats, olives and nuts, also for two days per week; and a standard, calorie-restricted daily Mediterranean diet for seven days per week."