Well, if you follow Starcraft progaming (which is basically just Korea gaming), the coach of Samsung Khan is actually a girl. Shes, though, like only 1 of 2 girls ever to get a chance to play in starcraft progaming though....

Well, guys are usually more exposed to computer games in general. There is a pretty high chance that most teenage guys have played an FPS once before. FPS have some differences, but the basics are still the same: jump around while shooting at the heads of anything that moves. Thus, girls would have a disadvantage as to getting used to a new FPS quickly.

This would be likewise if a guy was handed a mascara and asked to use it as compared to a girl