I have never seen anything that says Apple uses Gorilla Glass. Until Apple comes out and says they actually use Gorilla Glass (they may have, but I haven't seen it) or Gorilla Glass 2, or until I see Apple put their name on THIS list, I will continue to say Apple doesn't use Gorilla Glass. Every other manufacture says point blank they use it. I know of 6 people in my small office that have a 4S, 4 of these six have badly shattered screens, the other 2 have screens with small cracks. They all use the Apple bumper. Just bad luck? I don't think so. I have never seen any phone with Gorilla Glass, especially the Galaxy S line of phones (most common I see) ever shatter from just a typical drop.
http://9to5mac.com/2012/03/02/apple...ne-means-gorilla-glass-2-likely-for-iphone-5/
http://www.engadget.com/2012/03/02/apple-name-drops-corning-as-iphone-glass-manufacturer-we-feign/