In So-Cal driving around town- the name of the game is: stay out front, and if you're going to pass, do it fast.
Other vehicles around town actually get out of my way more often than they get in my way. I am starting to think that its because the bike is white and maybe they are thinking I am a cop until i zoom past them. Either that or people in my town are just considerate.
On the freeway its another story, lol. Pass EVERYONE, they are all idiots. Never stay beside, or behind anyone. And don't let anyone get close to you. Just pass them until you have a stretch of road in front of you.
And when you split lanes- do it at a brisk pace. Don't lolly gag in between cars, that is probably the worst thing you can do. Get past the congestion and back into a lane asap.
That's how I do it anyways. Thumbs up for splitting lanes and getting me where I need to go faster, and safer.