User blog comment:Saratje/PC release date explained - Skyrim: Dragonborn DLC/@comment-75.121.252.164-20121203090620

The PC version being delayed doesn't mean that it's the DLC deal with Microsoft. It could very well be they are still working on high res textures for Dragonborn still, not to mention it gives us an advantage for Bethesda to hammer out some bugs that may pop up.