Now that I have grown up a little Warcraft-wise, I realize that this is in a way an adaptation to the battleground system. I do think that the twinks might do better at least as far as their reputation goes, if they played in their own battlegrounds, where they would have equal footing with other twinks.
The current experience system allows a character to stay at level 19 for a very long time, enabling them to get the most out of their PvP-ness before sliding into the next bracket. Does this mean that when experience gain is boosted in a future patch the world of the twink will die out? I don't think so. This sub-culture arose because of the desire to be the best at one specific aspect of the game. Will this change things for them? Sure, but I expect that the same inventiveness that went into the creating of twinks in the first place will also spur them to adapt to whatever affect accelerated exp. would have on them.
What do you think? Will the twinks survive, or be lost to the annals of WoW history?