Online gaming study: Women play harder

A study of gender differences in gamers out of University of Southern California reports that “women play more intensely than the guys.”
But the women also consistently under-report how much they play, and when playing with male partners the women “toned down the violence” while the men played “more aggressively.”
Any gamers out there want to weigh in?
On a related note, can someone tell me why when I searched for images of “girl video games” or “girl playing video games” a whole bunch of girls in their underwear, or naked covered in various games?