Admittedly, we were visiting during a holiday weekend (MLKJ), which may have contributed to limited use. Still, I wonder how much they're used on a normal weekday given what seemed to be exceptionally dangerous riding conditions, particularly at intersections.
Most bikers we saw during our trip rode within the confines of Central Park. While they still had to dodge meandering tourists, runners, and an occasional horse-drawn cart, it seemed a much more relaxing experience.
I wonder how many of the bicyclists we encountered that weekend are able to 'escape' the city to ride on open roads, without the endless pressure of being surrounded by ten million people. Conversely, I wonder how many bicyclists move to New York City from other parts of the world where open roads are the norm. The transition must be difficult. I know it would be for me.