[serf]

not always. western games tend to be bound that way, but Japanese games, espescially RPGs , were not.

example : final fantasy 7 control bindings. http://www.cavesofnarshe.com/ff7/buttons.php

[Sektor]

Interestingly the positioning of the two matches the common use of the nintendo buttons, A for confirm and B for cancel. The western Playstation games are really the exception to the rule.