I actually experienced an LB some days after you talked about it!
One of our members had dcd from the start, yet we were still close to winning. And when I finally got the cd off some of my pvp skills I hear the lb sounds and I was dead haha.
But most of the games I play last for a few minutes only. I'm only rank 15 and I still get new players in my team that's never played pvp so I guess they go on longer when I rank up further!