The article says that gamers are more likely to have dreams from a third person perspective. I'm assuming not people that play FPS's. I can attest to that, whenever I'm playing third person perspective games I dream viewing myself from outside my body a lot.
Or maybe it's all games. Not really sure. Haven't played games for a while but I just got bioshock 2 so maybe tonight I can test this lol

Also I think it would be easy to WILD after playing games a lot too because if I play for hours straight I close my eyes and am basically playing the game again. I've only tried to make this in to a dream once, but it was at night, not through WBTB. So it didn't work.