I tend to stay away from the more twich orientated games, but you certainly don’t see a lot of really young kids owning TF2 servers. You’ll certainly find a decent skill level amongst 16 – 21 year olds but as a general rule of thumb, the younger they are the more mistakes they make. I’m still one of the younger ones around here though, so I guess I’ll find out over the next 10 years or so how true this is 🙂 I imagine computer games will be similar to the likes of snooker, where a player tends to decline later than in other sports where there’s a more physical requirement.