Last time I checked, "hardcore" didn't mean "plays games a lot"; it means that you don't spend all of your money on "pet games" and "style-games" and "generic sports games" and instead spend it on games that are, as the hardcores call them, "good". "Good" games include things like Smash Bros., Bio Shock, Metroid, Metal Gear Solid, The Legend of Zelda (especially Ocarina of Time and Twilight Princess), and other games that require a lot of skill and time. Just because girls play a certain online game more than males means they're more "hardcore"? Did they take the "genre" of the game into account? No? Then how the crap does this pass as being scientific?