Epic Games’ Steve Polge wrote on the game’s official forums: “Unfortunately, due to circumstances out of our control, the certification process for the PS3 patch and DLC has taken much longer than we expected. As a result, we have been forced to push back the release date for the PS3 version to 3/19.”
So it appears that only the PlaySation 3 patch is affected and we might still get the PC patch on schedule. But I wouldn’t bet on that, so better be prepared to wait a couple more weeks for the Unreal Tournament 3 Titan Pack, no matter for which platform you have the game.