[Arizhel]

Yeah, I'm just going on his statement that it was "one mile", which I take to be the actual Manhattan distance, not the crow's distance. You have a good point with the walk signals, but as someone who's spent a fair amount of time walking many miles around Manhattan (but not SF, so I don't know about that), I never spent much time waiting for walk signals. With the grid layout, it's pretty easy to take a route that has you catching the walk signal almost all the time in one direction, and then opportunistically cross the street or change direction when you happen to catch a red light in that direction.