That's absolutely true but you're wrong if you don't think that plays a part in the outcome of a big game. Players notice it, clearly they do as they are commenting on it.
DC is a solid baseball city because it's affluent but it can't compete with certain fan bases who live so vicariously through the outcome of sports. I was visiting a friend in Pittsburgh a few weeks ago, he said it goes DEAD in a lot of neighborhoods when the Steelers lose. These people live for their team and it comes across in big games. DC absolutely has those kinda fans but they also have front runner smucks who don't care about the games but want to be at an event.
Do you think fans are leaving early on a SATURDAY NIGHT POST SEASON GAME in Boston, St Louis, __(insert about 15 other cities here___) No.