First time I ever took a subway was in Chicago. I was, I don't know, maybe 18-19. It's the same there as for NYC, you just wait until it shows up. No times, no schedule, you just wait. Luckily it does seem to come every 5 minutes, so it's never much of a wait. But that was normal for me.
So when I moved to Japan and saw timetables at all the train stations, I was a little shocked. I mean it makes perfect sense, and at this point I can't imagine doing without, but at the time coming from the Chicago way, it was shocking!
heh funny how that is.