Hmm...only in the same sense that the currently largest "gamer" demographic is statistically 35-50 year old females.
I would expect hardcore gamers to take urinal games less seriously than they take internet flash games.
That is a statistic that I am fine with. That is the exact target demographic we need to get gaming to cut down on the soccer mums freaking out over oh my god video games.
Also hardcore gamers will take the urinal games seriously as soon as it gives you unlocks in their regular games or it has achievement points and at this point in time both of these things are inevitable. I am fully expecting official CoD5 urinals.
Given that CoD7 was recently released, I wouldn't hold your breath for CoD5 urinals.
And acceptance of all videogames due to playing Flash games is no more automatic than acceptance of videogames because you play card games like hearts, bridge, and cribbage (among the online videogames counted for that study are, yes: hearts, bridge, and cribbage). Much the same way if you went to an American book burning, you probably won't find people burning The Bible. Harry Potter, though? That's witchcraft: burn it!
The moral of this story is: "kids these days! We need to burn all their stuff!"