From his article at the Huffington Post:
My own personal opinion is you could design a dozen diet studies showing the superiority of a dozen different diets (from Atkins to Ornish to the Zone) as long as you compare each of them to the crap we’re eating now.
As for Dr. Bowden’s repeated claim that there’s no specific Mediterranean diet, here’s one! It’s as specific as any other mainstream named diet out there.
Advanced Mediterranean Diet 