I think the intent of being a twink is to be the shafter, not the shaftee.
I've given battlegrounds a couple of proper goes over the years, but ultimately they aren't for me. Spending an hour losing Warsong Gulch did it for me the first time, and watching people make the same mistakes they've been making for years in Arathi Basin did it for me last time. The tantrums, the self-righteousness, the screeching - I'm not sure why anyone subjects themselves to it. Damages my calm, personally.
On the other hand, if you do like battlegrounds, I think this is an excellent move. There wasn't a lot of point joining battlegrounds in the 40-45 bracket, which is probably quite a problem now that you can level through pvp.