GTA V on Xbox 360: "For Optimal Performance Don't Install Play Disc Data" says Rockstar
Gamers who will be getting GTA V on Xbox 360, Rockstar Games has an important message for you. GTA V for Xbox 360 comes out on two disc, first one is "mandatory install" (8GB) and second one is "Play disc" (same 8GB in size).
Rockstar Games has just stated via their Twitter account that Xbox 360 owners should not install "Play Disc" for optimal performance.
Furthermore, Rockstar Games has promised to reveal more details (via their support site) behind this warning at GTA V launch.
@mfw For optimal performance, we recommend not installing that disc. We will have more info on our Support Site at launch. Rockstar Support (@RockstarSupport) September 16, 2013
So guys if you are getting GTA V on Xbox 360, make sure you follow this guideline ("not installing play disc data") from Rockstar Games for optimal performance.
UPDATE: Why You Shouldn't Install the GTA5 "Play Disc" on Xbox 360