This is not a drop test. This is the first iPhone 4 that breaks after a simple accident that anyone may have: A 0.5m drop.
The back of it completely shattered. I'm convinced that this will be the first of many broken iPhone 4s. It appears to be functioning correctly but the glass needs to be replaced. At the Genius Bar they said they don't have any replacement phones or parts yet and we had to make an appt for Friday (they still don't have any insight into procedures for this situation but said to come in anyway). Hopefully they replace it for free. I've dropped my 3g from far higher without causing any breaks. This was the damage after about a foot fall.
I love Apple, I really do, but for a company renown for superb SCM practices, they fell short here… shipping early without procedures and/or parts in stock.
Unlike the drop test, this was a full phone from the factory. When I asked Jared about what where the circumstances, he said it just "trickled down about a foot while getting out of the car".
An industry insider recently pointed at the probable causes for easy glass shattering and chipping. While we are investigating his claims, here is one piece of advice: Try not to drop your iPhone on other glass surfaces. That and remember to buy a bumper and/or insurance. [Jared Franklin]