Since release Call of Duty Black Ops 2 has had some issues on the PS3. These issues are mainly freezes that occur at random times, and also when you join the first game of the day, or a game already in progress. It will freeze on awaiting textures from my experience. The fix for this issues is patch 1.04. I do believe that it fixed the awaiting textures black ops 2 freeze, but after I update to the new patch yesterday, the game from on a black loading screen with the trinity black ops 2 loading icon.
It seems as if they fix one thing they break another, definitely not a smooth release, but I am hopeful that they will get this fixed, at least by patch 1.06 :P.