If you were planning on making yourself a nice sandwich for your first session of Final Fantasy XIII, it looks like you'll have to make it before you pop the disc in your PS3. According to IGN, director Motomu Toriyama told Famitsu that FFXIII will not require an install on PS3. Furthermore, other than the transition between town and field segments, the game won't feature any loading screens at all. Toriyama stated that loading time was one of the biggest concerns from the beginning of development.
We're sure there were at least a few folks out there looking forward to watching a Chocobo take a smoke break. Alas, it just wasn't meant to be.