A recent article on The Huffington Post says it is:
How can an eating pattern that came about decades ago in the rural areas of the Mediterranean possibly be the diet of the future? Well, today it is no secret that the Mediterranean diet is the gold standard of diets. Not only because it has years of research supporting it, but also because it is an eating pattern that tastes really good. The new, updated U.S. Nutrition Guidelines recommended it as a healthy eating pattern, a few days ago a report by prominent physicians and researchers also recommended the Mediterranean diet as the ideal diet for prevention of cardiovascular disease. The diet is the most researched diet that exists and is also considered a sustainable diet. The Mediterranean diet has been presented as a model and example for a sustainable diet by the Food and Agriculture Organization of the United Nations (FAO).
Read more: http://www.huffingtonpost.com/entry/mediterranean-diet-the-diet-of-the-21st-century_us_58b9203de4b0fa65b844b1d5