Jason Koblovsky was the first to report this on his blog.

UPDATE 1/19/11: Treyarch has responded, in which I firmly disagree with their assessment. Their response and my reaction to it can be found on More Troubles Headed Towards Activision

I (like the majority of Call of Duty Black Op's PS3 gamers) have been experiencing a huge number of connection problems for the past 3 month of release of this game. I've been in dialog with Activision with respect to the problems associated with this game, and following the call of duty forums (PS3 forums are filled to the max daily on complaints with connection problems with the multi-player of this game). I've posed some questions with respect to what Activision and Treyarch are going to do to keep the loyalty of the PS3 gamers to the Call of Duty titles due to the consistent problems PS3 users have been having and reporting to Treyarch since release. Activision offered the following and startling response:

Well I have nothing else to offer and I too follow forums and have many friends who play and enjoy the game for all of its features. As an avid gamer, I would ...