It didn't state it was a census as apparently they conducted the study with 2,200 "active" gamers. Also how did they conduct the study? By player response or by survey? Extraneous factors have been stated that the study does not specify which games they have looked on, they should have categorized certain game categories and survey those gamers within that game type. All of this is kind of hard to believe as plenty of extraneous factors are apparent.