Agreed, Kimimaro. Partially.
The thing is that online distributors often get a tentative date (such as Grosnor, Troll and Toad, etc.) off of which to base their online pre-orders. For those online distributors, that date was sometime the first weekend of December (7th or 8th). Also, I'm sure I could back through Tylar's last Corner thread and find the post where he himself said he has the date as "December 8th".
While no date was explicitly established by Bandai, this comes down almost to a case of plausible deniability on Bandai's part. Which isn't the point of this thread, so let's leave that point alone.