Apple Retina and PWM
This post is deleted!
I have not detected visible flicker from PWM on any of them, including Retina MBP, iPhone 6, iPad minis. iPad pro feels somewhat more flickery when using it. but it's not the flashy sort of PWM that makes your head hurt to look at. Some people are working on this issue, read up here: http://energy.gov/sites/prod/files/2015/11/f27/miller_gaines_flicker_portland2015.pdf