Compare that to the US, where a coffee shop like Dunkin' handles like a thousand people every day during rush hour and people still mechanically say, "Hi, How are you doing? What can I get for you today?" and it's inevitably met with "Good, how are you? and I'll get x, y, z..".
I'll admit to finding that transaction incredibly dishonest when I came here first, to the point that I was actually complaining about it to people. I mean, does the person at the counter really care as to how I was doing? I'm used to it now, it's almost become an instinct, but still cringe a bit when I catch myself doing it involuntarily.
Old habits, etc. I guess.