So I'm now at 4 days and 10 hours of play time (type "/played" in the prompt and you can find out how much time you've played). Stormy Waters, the highest level player in our guild, is level 56 and has put in 18 days in.
This is literally how many hours one has spent in the game. So you can get an idea of the time investment involved to get high up. ; and how addictive the game is.