Only reason I mentioned that is they use the same gorilla glass but a thicker version; as much as Apple charges for these phones, you'd think they could beef up the glass fronts & avoid all the scratching & breakage issues :-(
Same thing happened to my Fascinate when less than 2 wks old .. and my first smart phone. The reps at the Verizon sore from where I bought it, debated about replacing, but I had pointed out I had not dropped it, and in the hard shell holster case for max protection. I had no insurance at that time. No doubt the glass was defective and constant touching the screen added to spidering. They did replace it on the spot with a new one. I added insurance and have it on my i5.
If they make the glass thicker, the touch sensors might not be as responsive.
I had a small crack after the phone slipped out of my pocket while sitting on the ground, this happened 4 days after getting the phone.
I called apple and set an appointment with the Genius Bar, they replaced the phone with no questions asked. I don't have Apple care or any insurance, but I'll be buying it now. I've owned every iPhone so far and this is the first I've cracked.