Boing Boing:

Video gamers may have the same mental agility as bilingual people – an ability to swap out one task and bring another online quickly, which is useful in multitasking and is linked to lifelong mental acuity. A study at Toronto’s York University showed that gamers performed like bilinguals in hard mental tests, and that bilingual gamers were even better.

I’m not much of a gamer (although I’d think it would apply to power users in a more general way) but I’m quite happy finding out that I’m more intelligent than average (which is nothing new) and, more importantly, that my brain will age better than yours!