The study says that more woman are obese: I.E.: Looking at healthy body fat in the two genders (where the healthy body fat levels for woman are already higher then men), more woman are above those levels.
Secondly, with less testosterone, women put on and maintain muscle with less ease than men. Since muscle burns more resting calories than fat, women must restrict their calorie intake more strictly than men do - even at the same weight and activity level - if they want not to gain.
The study conclusion is simple: Obesity in men stabilized, obesity in woman is increasing.
"BMI was calculated as weight in kilograms divided by height in meters squared, rounded to one decimal place. Obesity in adults was defined as a BMI of greater than or equal to 30."
All in all the study is about how these BMI measured obesity levels are stabilizing for men but increasing for woman and there is no rational way to go around the conclusion... so I don't get why people are so against the conclusions of the study.