that is true.
on the actual ptr, the horde are 2 or 3 times more, every time they schedule some world-pvp action.
same for the stress-test-server.
after the first couple hours, there were more horde in elwyn forest than alliance.
plus, ghostwolf form and the better horde racials, help a lot in world pvp.
alliance will suffer out in the world.
but at least they will have instant BG queues XD