Grand Theft Auto V Leaks?

Kotaku has word that Grand Theft Auto V preloads on PlayStation 3 may have given enterprising hackers the chance to dope out some of the game's content by examining the contents of some of the game's files. Spoilers ensue, which may or may not be made up. There's also a story on IGN about soundtrack details making this sound pretty authentic. Thanks nin and Fantaz.