Someone mentioned it and I paid attention to what I was doing all the times I dc'd: falling off tun roof, jumping when getting into the fray, jumping up the ramp into the flag room, jumping when planting my horde battlestandard... a hunter mentioned they dc'd a lot when disengaging, seems like an air problem to me. I'll try to deliberately dc next bg and see if it follows through.
At any rate I got a "we know, we're working on it" response from a gm within like 15 min of my ticket going in, in case anyone's interested.
Edit: of course this doesn't confirm anything, but I just went into combat intentionally jumping like crazy and dc'd in about 3 seconds.