Not surprised, it would have gotten slaughtered with the plethora of releases this holiday. Doesn't even seem like Driveclub or FH2 made much of a dent either, so it may not be the best time for a racing game to be released.
I'm guessing the Wii U version will be pushed back even further. I wonder when we'll even see pictures of videos of the Wii U version. Like maybe a week before release or something? Have we even seen official pictures or videos from Watchdogs U yet?