When you figure in that the price for consoles has dropped down a bit from when they were first introduced, there would be more people who OWN the console to play the games, hence more buyers. Add on to that all the hype and publicity that the game gets, both positive and negative, I can agree that would push the game selling so well. No question that even the previous releases of the GTA series have been VERY popular, hence it would be highly anticipated, not only for the hardcore fans, but even for those who just want to see how the new game compares to the older ones on a brand new console.

And yet… I don't know whether I agree with the whole "OMG its awesome buy it NOW!!!1!" best selling game title. It will have to be compared to future big name games that come out in future to really see whether it's doing over-the-top well, or the industry is just expanding that quickly.

Personally, I'm waiting for MSG4.