This is incorrect due to a common math error. Quoting the GameDaily article the Joystiq sources, "During the March-September period, the Xbox 360 sold 138,740 units compared to 88,292 during the same time a year earlier."
That is not 157% growth; that is 57% growth, or 157% of the previous year's number.
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That is not 157% growth; that is 57% growth, or 157% of the previous year's number.