User blog comment:The Milkman/Dragonborn DLC coming to PS3 and PC/@comment-58.172.217.12-20130106080324/@comment-4147517-20130106164110

We don't even know, so we shouldn't even start speculating.

From what I heard, the reason why XBox got the DLCs first was because their able to easily port it to them first, and that the PS3 is a more complicated system.