Look, this is probably temperature and OLED dependent.it is not BS. It is easily reproducible.
If Red Oak used LCD based iPhone, he wouldn't see it. If you live in a climate where 25C indoors is normal, but Red Oak in an area like where I live and 19C is more common, then you would see it more often than them.
Just guessing a sort of maximum climate difference, from your profiles and usernames:
Average Weather in Sydney, Australia, Year Round - Weather Spark
Average Weather in Toronto, Canada, Year Round - Weather Spark