The first and most recent article reports on a study of the low fat diet vs. the low carb diet and the surprising outcome. What's really surprising is that this study had been repeated in other places years before with about the same results. See the second article (which has already been mentioned here some time ago.)
http://abcnews.go.com/WN/story?id=5388954&page=1
http://query.nytimes.com/gst/fullpage.html?res=9F04E2D61F3EF934A35754C0A9649C8B63&sec=health
The bottom line is what works for you and your blood sugar and your other lab results.