This is further complicated by the fact that it is not clear if these numbers are "shipped" or "sold".
As anecdotal evidance, in my local Walmart, there were plenty of XB1 and PS4 units available (shelves were full) this Saturday morning (around 10 am). Two people bought PS4's while I was browsing. Although XB1 shelf was deserted at the time, I'm sure I missed the whole line of people who baught XB1s minutes before.