I am trying to compete in Lord 19s WSGs everyday. the week is roughly as this: 3-4 days of alliance domination (regular number of twinks vs 0-1-2 in horde) 1 day of horde domination (opposite to the above) and 2-3 days when forces are roughly equal.
Alliance hunters? once per week maybe, alliance queues 3 or more hunters. And unless its a day on which raid locks expire, every second wsg half of horde team are hunters. I'd say that alliance has a hunter on almost every bg but in horde hunters come less often, but in large groups. :)
So every twink is welcome, even though, horde is mainly hunters, shamans, druids or warlocks. I'm surprised that on this server there are so few twink rogues. At least on horde side.