Now this one is more serious, or credible - straight from The New England Journal of Medicine :
"In conclusion, in this primary prevention trial, we observed that an energy-unrestricted Mediterranean diet, supplemented with extra-virgin olive oil or nuts, resulted in a substantial reduction in the risk of major cardiovascular events among high-risk persons. The results support the benefits of the Mediterranean diet for the primary prevention of cardiovascular disease."
Translate: "energy-unrestricted" --> "eat as much as you want""substantial reduction in the risk of major cardiovascular events among high-risk persons" --> "less heart attack if you're at risk".
Well maybe do not eat as much as you want, but basically, olive oil and nuts are good for you.
If you are scientifically inclined, the whole paper is at: http://www.nejm.org/doi/full/10.1056/NEJMoa1200303#t=articleMethods