Yeah, that is what it is. While they say it will keep some exclusive stuff on the Wii U, there really is no logical sense for a delay. The game is complete. A timed exclusive would have been far more logical, even from a financial point for them.
Sure, the Wii U's launch hasn't been amazing (albeit better the launches of the last two HD consoles), but come on.
I think Ubisoft may have just caused a massive rift between them and Nintendo, considering all the hype Nintendo has been giving this game, which isn't a good thing.