Why in the world is this being downvoted? All of the five combinations they tested were low-fat. This is actually the point I wanted to make, too.
Yes, the absence of a high saturated fat diet leapt out right away. That's what wins the clinical trial equivalents of this.
Very true, the fist thing I wanted to look for - "how did my favourite high-fat, low-carb diet rate in this study? Oops, how are the results of any use then ..."
Maybe it's just overzealous copywriting, but it seems like all they figured out is that a low GI, high protein diet is better than the other combinations they tested, and are far from solving anything rigorously.
Overzealous copywriting?! By a "science" journalist?! NO!!!! Here's the original article. I wrote a partial defense in another comment.