TWRoO on 30 December 2007
Basically the three consoles just increase by a timer, so if you count how many Wii it increases by in a day, and then do the same 10 days later you will get the same number.
Occasionally the numbers are updated to be closer to reality [possibly using the quarterlys? but I'm not sure I should even give them that much credit] but the rate at which each console increases hasn't been changed, which is why their numbers show no holiday sales [nor any other sales spikes like price cuts]
