I read Taubes' book on the value of low-carb diets (well worth reading; I learned a lot)-- the evidence seems compelling (but then again, I'm not a nutrician), and I haven't really seen similarly compelling counter-evidence. Atkins/Taubes do seem to be the contrarians here.
The results of the study in Sweden do not seem conclusive to me:
After 2004 fat intake increased sharply for both genders, which coincided with introduction of a positive media support for low carbohydrate-high-fat (LCHF) diet.
From this preliminary result, it's hard to conclude that low carbs are the problem here. The first step would be to show that, well, the subjects actually followed a low-carb diet, not just a high-fat diet. Hopefully the study, once completed, clarifies this.
This seems like an authoritative 25-year research project that the Atkins diet is pretty bad:
http://www.nutritionj.com/content/11/1/40/abstract
Right now my belief is that the Atkins diet is good. It's backed by anecdotal evidence of trying a low-carb diet for 18 months following a 12-month low-fat diet and seemingly getting better results with the low-carb diet.
I'm counting on LWers to tell me how to update my belief in light of this study. Thanks.