There seem to be a few people who commute around the same time in the very early morning I do, but I only actually see anyone 3-4 times a year. I always greet anyone I see. On the 2-3 occasions I have actually caught up with someone and started a conversation the visit was always short-lived because I always stop for red lights, and others NEVER do. Most of my "Hey" buddies are the folks I see waiting for the bus every morning.

In the afternoon I often see other cyclists because part of my homeward route is on the primary cycling area. I always say "Hi!" but seldom get a return greeting unless it is someone I already know, because these are mostly "serious" cyclists.