What makes this happen is the fact that the iPhone's physical appearance never changes very much. You could do this with some cars models too. It's sort of a placebo effect. Just telling them it's a new version makes them see non-existent differences.
That said, I think this video was posted a day or two ago. Or maybe I just saw it somewhere else.
Though I must say, it's quite funny to watch people make an *** of themselves.

Formerly the notorious nyc!
I've got more red flags than Soviet Russia!
There is a good chance that you don't like me, but there is a better chance that I don't care.
If I'm not insulting you, I'm probably not aware that you exist.
Jerry Jones in the draft room is suicide on the football field. The line of scrimmage is EVERYTHING. Something Jerry doesn't understand.