Not well...
In Blitz rooms, if there are 3 BB/1 CV or 3 CV/1BB, it almost always decides that it would be a great idea to put 2 BB/1CV vs 1 BB or 2CV/1BB vs 1 CV. I've had this happen to me many times... it also loves splitting the room up so more BB6s and CV6's are on the same side and for sure the other side gets the small cv or bb's.
It is amazing how many lopsided games there are.
On a side note, I'm not impressed at all at game splits.
I started the event 150 games over .500 and finished the event at like 100 games over .500. And it didn't mattter what ship I used, or how well/bad I did in a game. I'd score 150,000 points in a game and lose, I'd get SS or CV torped/bombed in the first 2 mintues and lose. It was amazing how many times I was on the weak team (and again, it wasn't always my fault we lost because we'd lose no matter if I was first or last one to die or if i got the higest attack or lowest attack).
One would assume that over the course of 2-3 weeks of playing, you'd have around a .50 record since you'd be on some winning an dsome losing teams and 1 ships rarely has a huge impact on how the entire game goes.