December 2012 NPD Thread - 360: 1.4m, PS3: 600-650k, Wii U: 460k, 3DS: 1.25m

[Barozi]

ethomaz said:

"NPD says that fewer Wii Us were sold last month than the original Wii sold in its first December in 2006."

NPD says that fewer Wii Us were sold last month than the original Wii sold in its first December in 2006.

— Game Developer (@gamedevdotcom) January 10, 2013

http://www.neogaf.com/forum/showpost.php?p=46294218&postcount=100

So under 605k.