Yeah, there are no roads around here with minimum speed limits (except for the interstates, and bicycles aren't allowed on them).

I stay right if the road is wide enough; otherwise I move into the right tire track and this seems to encourage safer passing. Of course, I don't ride on high-traffic narrow-width roads. It's often much faster to take the back roads or cut through a neighborhood than it is to stay on the road I would take in a car.