Earlier quoted context omitted.
In Japanese variants, he is correct. When Sony westernized the playstation controller, the O and X functionality was flipped. Sony is yet to comment on the reasons why.
It might be because of Sega's consoles, which were more popular in the US than they were in Japan, where Nintendo ruled. The Genesis' button layout was A,B,C arranged in a diagonal from bottom-left to top-right. A was usually 'accept'. The Dreamcast had a diamond with A at the bottom and B to the right. Nintendo's Famicom buttons read A,B from right-to-left, and that trend continued with the Super Famicom's diamond,…
My guess is that Sony thought that X and O wouldn't have as obvious connotations outside of Japan, and figured that people would assume the button closest to the player (X) would be the OK button. In practice, I have found that people with very little exposure to Japanese culture still have the same association with X and O in their heads and get confused when using Playstations ("you press X to accept???"), so I'll curse Sony forever for this stupid regional change.