I have not seen a thing about this, but I was theorizing in the smallness of games in years past and how come they keep making them bigger and had stopped focusing on compression to achieve greatness in distribution, installation and play. Old games used to be like that......
Of course, some one could blame the bigger and bigger game files sizes on the game companies trying to prevent the warezing of their games. If I remember right, orriginally game companies just tossed in HUGE video files at the end of every level or in the beginning of the game... so warez would be harder to do (on the 1200 modems!) Once they realized that warez people would just write a patch to patchout the videos, then it switched to big ass file sizes so transfer is slowed even more, and it is made more difficult to warez it apart.
Of course (again) this is allways worked around, so this small install size kicks ass. period. It would be nice if every company did this.