I've seen sites claiming the following numbers:
PS4: 1.1 Million
XBO: 1.0 Million
with about ~100k separating them.
One of those sites later posted:
"Editor's Note: Due to the controversial nature of this article and the sourcing, I want to go on record as saying that the information provided here is 100% accurate and not something rumored. These are the facts for the November NPD figures and they have been vetted. -DR
Take it as you will.