We rented a car about a month ago... drove from Paris down to Brittany and Normandy... and the only place we seem to have come accross this "person to the right" thingy was in those dreaded "roundabouts"....
That said, it seems in Paris, or anywhere in France, MOTORCYCLE DRIVERS MAKE THEIR OWN RULES!
We never had anyone dart out in front of us from a side road, not once. I'm sure there must be some other folks who've done the motorcycle thing in France that could answer your question better, but I'm afraid I don't know any such daredevils.