I've always noticed that people stay to the right on escalators in Boston. Even the people who break the mold and stand in the middle or on the left tend to move to the right when someone comes up behind them. It's sort of like driving where many people will sit in the left lanes of the higway (except for some reason on the SE expressway) until someone comes up behind them and then they move (again, usually).
What I like about Boston: most neighborhoods are not infested with McD's and Burger King.
We must commute in entirely different circles, because I so rarely encounter uniform adherence to this unspoken rule here in Boston. To be fair, though, I have seen it more frequently when I've exited from the commuter rail platform at Back Bay during the morning rush, but I still encounter the occasional escalator slug whose passive-aggression and/or cluelessness causes everyone else to yield to her (or him).
In London there are signs everywhere telling people to stand to the right and in NYC, people will literally yell at you if you disregard the rule.
^^ Sure you can. You just need to lower your standard of living. A lot.