Ok this sounds dumb but hear me out because I got a second opinion on this so I know I'm not crazy: has New York seemed ... more slippery this week? Not frozen ice, but like a fine film of soap all over the subway floor?
So the thing with D.C. Is that because of the tiles, everyone knows they always get wet in weather and acts accordingly. I've never experienced this in NYC before, and it's all different kinds of flooring.