My experience is very much like Grog's, tho' I'm down in the middle of Illinois, including watching how drivers consistently make more room if I"m just a tad further out. I can imagine that there would be places where drivers would be different, but this seems to be the natural response.

And computers with a cadence counter tend to be wired for the rear wheel (if you're like me and have serious trouble with doing anything different than what the dcirections say).