@Arbiter, The only thing that I would be wary about is the fact that it is not known whether these figures provided by Microsoft are for units shipped to retailers (which they are in many cases to make the data look more impressive) or actual units purchased by consumers.
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The only thing that I would be wary about is the fact that it is not known whether these figures provided by Microsoft are for units shipped to retailers (which they are in many cases to make the data look more impressive) or actual units purchased by consumers.