Your comment was the top one and it encouraged me to just click through to the article and... I just don't get it after the first paragraph. Indeed, colour blindness? But that doesn't make you "know" it wrong, that makes you not be able to tell (afaik). So then... the kid was either joking, had learned it the wrong way around, or tied the name 'red' to the bottom position perhaps.
... turns out it's a localization problem. If you're sitting too low at the front of the queue, you'd see the overhead traffic light often better than the drivers do. I didn't think that this must, of course, be another USA-localization story and the traffic lights are elsewhere over there (across the crossing I guess).
> used to driving at confusing intersections where it's not clear which light applies
and I guess that explains why there are different systems. Why not change them around in the USA as well? It's not as if people could be confused and look at the wrong lights, as the others' lights are simply not visible when the lights are all on the side nearest to the lane(s) they apply to.