Earlier I actually had a match start counting down with only two people on my team, counting myself (I guess someone crashed or something? It's not supposed to start until each team has at least 3). Before the "gate" actually opened, the other guy on my team quit, and the game started with 3v3v1. One other person came in on my team fairly quickly, with 2 more staggered out over the course of the match (didn't get the 4th until probably almost halfway through the game). By the end of the match my team had actually pulled off a victory, but one of the other teams never went beyond 3 players.

Having the game start with a team of 3 kinda stinks, but I guess it's somewhat understandable in cases of someone crashing or disconnecting. What I don't get is why some teams can get stuck on 3 players for a full 15 minute match, even if it's during (or near) prime time, with multiple different BGs going and a lot of people in the queue. Without separated solo and group queues, I guess it's acceptable to leave a premade team with the 3 people they queue'd with, but if everyone's solo it can mean a pretty sizable disadvantage.