I think he's talking about backfill into warzones where you literally load into the zone only to see the scoreboard pop up before you can even leave the spawn--which has happened to me twice in the last three days.
This is a perfectly legitimate complaint. Why should I have to give up my spot in the queue to have the match end before I can even take one action, and get nothing for it? It's lame.
You wonder why this is becoming more prevalent as of late? Because the amount of twinks in the game is increasing. 49 Twinkies leave at the end of the WZ to keep from getting xp. I'd venture to say filling in late in a wz is a direct result of this, not someone simply DC'ing.