I'm not sure what Apple did with their glass after the 5, but I've not been impressed with the scratch resistance of the 6 or 7. I don't recall having any scratches at all after a year + of ownership with my 5. Yet my 6 had a lot of light scratches after only a month of ownership, despite it being absolutely babied. It seemed to be hit or miss on the forums though. Some suspected a faulty oleophobic coating that was applied too thick on some phones. Likewise my 7 has some light scratching as well. While only noticeable under light, it's still significant enough to be annoying considering I never had these issues in the past. My phone is never set face down, never put in anything but an empty pocket, etc...