It would be nice to have official information about the glass that is used on iPhone 6. My latest phone before it was iPhone 5, which I had for 2 years, and the screen didn't get a single scratch on it (I am careful with my devices).
After two months, my iPhone 6 has a couple of hairline scratches (small though, and only visible in bright light, such as office lights). Given that I've been even more careful with iPhone 6, it's kind of concerning, especially since I don't know what caused the scratches.
So in scratch resistance, iPhone 6 is inferior to iPhone 5 — or at least some batches of screens are. Having seen the iPhone 6 scratch test videos on YouTube, the ones where they use keys and knives trying to scratch the screen to no avail, I cannot help but wonder if the glass used in production is something other than Gorilla Glass. Or if Apple uses an additional glass supplier besides Corning to meet demand.
That would explain why some (most?) screens don't scratch (Corning's glass) and some screens do (2nd supplier's glass that's not up to Corning's quality).
In
this poll, factories C3 and F2 seem to produce most of the phones that have been reported as scratched. My iPhone 6 happens to be from the C3 factory, so it fits the pattern.
I'll see how my phone holds up in the coming months, and will contact Apple after the initial demand for the iPhone calms down a bit. Perhaps Apple will use only Corning's glass when the production volume gets to normal after the holidays (if my theory about two glass suppliers is correct). Of course it could also be that Corning is the only manufacturer, but they have issues at some of their production lines. I know I have an issue with the glass on my iPhone 6 unit.
To be fair to Apple, QC can be a challenge with the tens of millions of units produced, and as long as they don't throw the "user inflicted cosmetic damage" at me, I trust I'll be happy with their customer service. Always have been.