According to Sony's PR, they sold 2.1 million PS4's from launch to Dec 1st.
Accroding to MS's PR, they sold 2.0 million XBOne's in 18 days since launch.
PS4: November 15 - December 1 = 17 days [Avg. 123529 sold a day]
XBOne: November 22 - December 9 = 18 days [Avg. 111111 sold a day]
If averages continue the way they are currently (which they won't, but I'm doing it anyway, because I'm bored) these are the amounts sold since launch (not including today):
PS4: 3,335,283 units
XBone: 2,222,220 units
(This probably isn't true, because I think Sony would've had a statement about selling over three million if they did)
At this rate, the time each console will outsell the Wii U (~4m):
PS4: December 17th
XBOne: December 28th
:/