I honestly dont see wowhead going with that redesign and claiming its an official ad without it actually being so.

I'm not sure though what their intention would be with going live with it early, as you'd think if it were a mistaken push they'd have reverted it really quickly and just given a no-comment to wowinsider (even if they are the same company) if they wanted to remain on good terms with Blizzard.

I do know though that I'd bank almost everything I have on that being the announced date if a gun were at my head.