I took my iPhone 6 in recently because it was bent at the lower volume button. I've had the phone since launch day, don't recall how it got bent. I made an appointment with the Genius bar. When i talked to the guy helping me, i just set my phone down and showed that it rocked. He picked it up and said we'll set you up with another phone. I was in and out in 15 minutes.
I have Applecare+, i did ask if i would have to pay the $79 fee or if they covered it, he said don't worry about it.