My iPhone 5 glass is holding up as good as my 4, 4S,3Gs and 3G phones have. I don't see any difference so far. No screen protections used on my 4 or 4S. And none on the 5. Keep the phone in my front pants pocket or in my winter coat. But I don't let it rub against metal ID badges, sand etc. a little caution goes a long way. Regardless of Mohs scales.
And the iPhone uses the same Corning gorilla glass as others, made in Kentucky USA.
Oh no, now Kentucky is in the thread...