First thing I did after getting the patch installed was head into Alterac Valley, and I am very glad to say that the anti-AFK measures Blizzard put in place are working... for now.
It was amazing to see Horde up and at 'em again-- coordination still needs work, as we didn't wait around long enough to capture Stonehearth Graveyard and had to recapture it a few times (and I heard that earlier in the day, Balinda was double spawning), but once we cracked into Stormpike, it was all over. Horde is winning in AV again, at least in the Vindication battlegroup. As Foxx says, things haven't been this fun in a while.
We reported two folks out in our first match-- a flurry of messages in the chat line had them leaving the BG quick. One guy, however, actually came out of the cave to AFK, but he had a reputation, and we all voted him out before long. It'll be interesting to see how this all pans out going towards the future-- will the AFKers just stop trying, or will eventually they find another place to hide on the map where people won't notice? While I was playing, someone came to my door, and I actually went AFK for about 5 minutes, but because I was standing near the bridge where combat was going on, no one actually reported me.
So the system still isn't perfect, but it is many, many times better. If you were plagued by AFKers before, Alterac Valley is definitely worth another try. It's much more fun in there-- at least until the AFKers come up with another plan.