Many PS3 gamers have reported issues with Call of Duty: Black Ops II multiplayer, and Treyarch has said they're aware of the reports.
In fact, they have delivered a 56MB update, which presumably addresses some of the bigger technical glitches, such as the ones involving connectivity, matchmaking, and framerate. However, there are other lingering eccentricities, so some players are experimenting with easy fixes.
For example, a Reddit user has discovered what may cause the various pre-match freezing issue:
"I figured out that it's from looking at players emblems. DO NOT HAVE A PLAYER HIGHLIGHTED WHEN THE COUNTDOWN REACHES 0 FOR THE GAME TO START. I stopped doing that and I haven't had a problem since. And I tested it out to make sure that really was the problem, and yep the shit froze."
Of course, we'll probably need another update from the developers before things even out even more. For the record, not everyone is having such issues; I don't recall running into many problems during my play time, and most people I know haven't reported any problems. But so long as there are those who are having bad experiences with the game, it's certainly Treyarch's duty to fix things.
Related Game(s): Call of Duty: Black Ops II