You must move a character to BT. So by the time a player moves to BT, he usually already has a decent amount of time in the game, and is no longer "new".
Plus, emigration is pretty scare to newbies, unless re-assured by an experienced player many will not dare make the trip.
There are very few "new" people on BT, ever, and those who do make it are almost always tutored by someone or in a group anyways.
