This is a skill most
refined in
urban dwellers--most specifically, people who live in
cities like
New York,
Chicago,
London, etc. Sorry, if you live in, say,
Oklahoma City, or any geographically spread-out city, you won't have learned this skill.
Case in point--I was in New York with some people from Ohio and Kentucky. I was using my normal crowd navigation techniques, and after two minutes they were thirty feet behind me. To me, I wasn't walking fast or anything like that, my friends just weren't as tuned to the beat of the City as I was, or something.