Go check out SK Gaming Achievments done ranking and see how many players are like 2-3 achievments less than this guy,most achiemvnets in this game are pve and world,if you pvp most are done just like that,good pve guilds go for ahciemvnets for mounts /titles and shit so it comes along.
Theres probably some omg taking shit loads of time achievments but this doesnt mean he has no life at all..