That would be my guess. I'm watching the forum for a few weeks to see how the issue plays out. If indeed the 6s coating is more prone to scratching than older iPhones, it will soon be apparent. I wasn't willing to take the chance it would have been fine given some previous postings.
My phone needs are simple: browser, texts, email, contacts, phone, HoFo and Words with Friends apps are about it. My Galaxy S4 runs as smoothly now as it did a year ago. No issues. And no scratches. Heavier users have a worse experience judging from some of the replies above.
Every iPhone that I have purchased in the last 5 years had micro scratches on the screen out of the box. Take a brand new iPhone and place a light source over the screen and I guaranteed there will micro scratches on the screen. It's not the glass that's being scratched but the oleophobic coating that Apple's manufacturer (aka foxconn) is applying