Let's get this out of the way too before ANY GTA IV sales are reported.
It doesn't matter WHAT console you want to talk about. The larger your install base, the smaller the % attach rate will be. What I'm saying is, the more people that own X console, the smaller the % of attach rate for Y game will be.
Example for those that don't get it:
If you stuck with the retarded idea that when a console was at X install base, then Y game had Z% attach, you're arguing it sold better compared to the other console because the Z% attach was higher than the other console. However, if that was even a valid argument, then games like Madden on PS2 would have sold ~25M.
Early on, madden sold to ~25% of the install base. Therefore, @~100M, Madden should have sold through 25M on the PS2. However, that isn't what happens. Please, people need to understand that as your install base increases, the % of attach of ANY game decreases, but the sales INCREASE.
If you lowered the install base, the % of attach of the game would increase, but the sales would DECREASE.