@zeromous, Actually a staggered release vs. simultaneous release does have an effect when analyzing the hardware sales of the PS3. If the PS3 has the same number of consoles out there as the PS2 did this far from its first release (going by what has been brought up in the last handful of comments), then that would mean that the PS3 is selling slower than the PS2 in some territories as the PS2 had had less time on the market in some territories since its first launch.
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Actually a staggered release vs. simultaneous release does have an effect when analyzing the hardware sales of the PS3. If the PS3 has the same number of consoles out there as the PS2 did this far from its first release (going by what has been brought up in the last handful of comments), then that would mean that the PS3 is selling slower than the PS2 in some territories as the PS2 had had less time on the market in some territories since its first launch.