Ah, so that's more of a panel uniformity issue - that's indeed interesting if qd-oled wont suffer from that.I think he meant in reference to oleds physical display trait i.e. this:
I wouldn't expect any "gradient" banding on this:
http://www.lagom.nl/lcd-test/gradient.php
Nevertheless, LG OLED do suffer from a bit of banding in the lagom test if input is set to PC.