Okay spotted a news article about this study, which gave pretty ugly picture of how this study was conducted:

The participants were told to follow the diets for 2 months to the best of their abilities, and the remaining 10 months _to the extent they wanted_!

Now that is one crap study I say. Imagine people having been spoonfed and brainwashed to believe fat is the root of all evil, then told they can follow this high-fat diet to the extent they want... yeah I can absolutely see them all being very enthusiastic about it.

As a side-note, I doubt very many followed the Ornish diet either, lol!

So, I'd just throw this study to the junkbin. Big headlines over an absolutely ridiculously conducted study.