"The low-fat group included more grains, cereals and starches in their diet. They reduced their total fat intake to less than 30 percent of their daily calories, which is in line with the federal governmentâ(TM)s dietary guidelines."
This is not a low-fat diet. The 30% recommendation was an incredibly tepid compromise: the standard American diet is around 35% fat. So this its along the lines of telling peoople "Oh, you smoke 35 cigarettes a week? Try to keep it to 30."
For comparison, the Ornish plan is around 10% calories from fat.
So this study compared a high-fat, high-sugar diet (no restrictions on an America's sugar intake == high sugar) with a higher-fat, no-sugar diet. The usual crap research that people tout as showing low-carb diets useful.