Coincidentally, I almost got mowed down yesterday by a girl on a citibike. She made no attempt to slow down and if I hadn't stopped in the crosswalk, she would have hit me. As a native New Yorker, I am weary of cars, buses, and trucks, but I know where they are going to be, generally speaking. Bicyclists are a less predictable variable. They are harder to spot and don't obey any traffic rules to any large degree.
That said, I have observed that if they are a commuter with a helmet on, then they are likely to stop at lights and for pedestrians. If they have no helmet on, or are riding a citibike, then all bets are off and I should be very careful if they are heading my way.