Looks like Rockstar gave the exclusive content to Game Informer, because a user by the name of Gouda Jouji was able to upload the whole article onto the internet on a MGS forum site.
Also, we found out that the title is no longer exclusive, and it will be coming towards the Xbox 360, as well.
L.A. Noire is set to release in the fall, confirmed by Rockstar, for the Xbox 360 and Playstation 3.