http://www.tested.com/news/whats-so-special-about-iphone-4s-aluminosilicate-glass/429/
Of course, the new iPhone is promising a similar, indestructible style of screen — one that’s curiously similar to Gorilla glass. Apple promises the screen to be “20 times stiffer and 30 times harder than plastic” and also incredibly scratch resistant as well. This is all due to a panel of aluminosilicate glass, the same sort of material used by Corning to manufacturer their own device screens. In fact, the similarities are so consistent that some have questioned whether Gorilla glass is behind Apple’s new phone. We’ve reached out to the company, but have yet to receive a reply. — something that’s neither been confirmed nor denied by the company.
Yep, so is it or is it not? Unless it’s confirmed, it’s probably not... At least the glass on the back definitely isn’t - it shatters much too easily.