PS3 sales tracking almost exactly 360 sales.

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Here this should be a good example of why the PS2 line is hard to make sense of when comparing to the early life of a console.

http://vgchartz.com/hwcomps.php?cons1=PS3&reg1=All&cons2=GC&reg2=All&cons3=PS2&reg3=All&align=1

As you can see the Gamcube line blends in pretty well with the PS2 line at the beginning of its lifetime. So its really not a good way to look at it if you want a good idea of how they are performing in these early stages.

I am really hoping that in the future we will have the ability to zoom in or set the window size so we can look closer and see the differences a lot clearer.