I do think it depends on where you are. Here in the Denver area, bikes are very common, so drivers are more used to seeing us out on the road.
Circumstances also seem to make a difference. What I mean is, drivers treat me differently depending on how I'm dressed and what bike I'm on. It seems I'm more of a bother to drivers on my road bike dressed in cycling attire. If I'm dressed that way but on my commuter, it's about half and half; if I'm wearing my work attire on my commuter I rarely have any issues with cars at all. It's almost as if they consider me more like a vehicle since I'm dressed like them, and I'm using my bike for transportation instead of recreation.
Last situation, if I'm on my cruiser and on the road instead of the bike path, drivers again look at me like a problem - as if I belong on the sidewalk if I'm on that bike.