I would believe it to be fake honestly, because it looks way too JJ Trek, and not like Star Wars is supposed to look, and we understand that JJ knows Star Wars really well from the videos of the puppet, X-wing, and the amazing full sized millennium falcon. Plus for a CG Falcon, there are better looking 3d models out there (not that there's much detail to see from a small gif).

But if this was real, well I'd certainly not be happy. BTW, has it been confirmed yet wether they are using miniatures and real models for FX shots, especially space scenes as well? I haven't heard anything about that I remember.