Team Builder Matchmaking Time

Was there a change recently? Just today, for the first time since it's release, I'm having really long waits for my full group to find another group. It used to be almost always completely instant. Only two games, so am I just getting matched with a really weird set of MMRs or what?

Edit: Okay, so I've played two games today, both Team Builder.

In both games the matchmaking time - that is, the time after your whole team has hit ready - was very long: 10 minutes or more. Worse than this though, is that apparently when a player decides that the wait is too long and leaves it doesn't cancel the queue. Two members of my team on the last game had left the queue and had actually queued up for a ranked game together, only for their client to crash, and much to their surprise, to be brought into the team builder game when they hit reconnect.

So, for some reason, Team Builder queues are running long, and can't be cancelled by leaving the lobby.