Remember that PREDIMED study published a couple months ago. It showed significant health benefits from a Mediterranean diet supplemented with EVOO and/or nuts. The general press simply focused on the Mediterranean diet angle, which helped with my book sales (thank you!).
Lawrence Appel and Linda Van Horn have an editorial on PREDIMED in New England Journal of Medicine, from which I quote:
Policymakers already recommend consumption of a Mediterranean-style diet on the basis of a persuasive body of evidence from observational studies. Our sense is that the policy implications of the PREDIMED trial relate primarily to the supplemental foods. Specifically, in the context of a Mediterranean-style diet, increased consumption of mixed nuts or substitution of regular olive oil with extra-virgin olive oil has beneficial effects on cardiovascular disease.
Advanced Mediterranean Diet 