Well while I was writing that post I searched back to Christmas 2003 as the week falls across Christmas in the same way. (Why I didn't do this when making my predictions I don't know, considering I did it last year)
Here is the graph: http://vgchartz.com/hwcomps.php?cons1=GC®1=All&cons2=PS2®2=All&cons3=XB®3=All&start=37927&end=37990
So sales should fall for the week ending the 27th, but perhaps not so much as in your numbers.
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And yes, my Wii number is based on my belief that nintendo will ship 46 million, and have shipped 52 million (1 more than their current estimate) by March 31st
And my prediction for the next 2 weeks is that they will fall short of 400k average, so Wii will be at 34 million rather than 34.2 before the 10 weeks begin. so that's a 12 million gap, for which I have predicted 11 million sales.
