That's rather one sided analysis.
In 2009 Wii had release of WSR and 2D Mario which were much bigger than DKC and Epic Mickey
in 2009 Wii was just after substantial price drop compared to single retailer wide price drop.
We don't have November NPD yet and only 100% certain part of it is 600k sales in Black Friday week. Assuming November 2010 number is estimate from VGC numbers and taking into consideration October Wii sales were 30-50k higher than NPD numbers that alone might mean substantial diffrence in Nov/Oct multiplier.
December 2009/October 2009 was 7,3x if we used it same way for 2010 we would have 1700k December.And that's another extreme just from looking at same numbers from diffrent perspective.
I predict 2400-2500k for December NPD.
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