noticed the tiny scratches on my 6+ under the post office lights today... they're real. you're not crazy. the fine scratches are nearly impossible to notice, but once you see them they're hard to ignore.
I have always used screen protectors/wraps on iDevices after my iPhone 1 got scratched badly very quickly under normal use. on every single one... iPads, iPhones, etc. It's just a personal preference.
I left a screen protector off an iPad 4 that never left the house and since that still doesn't have a scratch on it, I was more hopeful for the 6+. I ordered a screen protector for my 6+ before I even bought it, but didn't apply it due to the nature of the curved glass & swipe gestures. it just felt good without one... I blame myself, but that doesn't make it suck any less🙂
admittedly the scratches can be very fine, but I now am going to err on the side of caution and apply it. good luck everyone