When I was in California last fall I worked up to lane splitting but nothing like the guys on those skinny little mid sized sport bikes. The handlebars on the BA are at least twice as far across as theirs.
I took the coast highway from Long Beach to Santa Monica Blvd and went through Beverly Hills on my way back to my buddies house in Alhambra. I got stuck in a traffic jam just East of Rodeo Drive and couldn't get more than a few feet every several minutes for about half an hour. Luckily I had the oil temp gauge to tell me that the hot smell was certainly me. I had to shut off the engine each time I stopped and only started it long enough to move with traffic and then stopped it again. I couldn't lane split because of the narrowness on the street, I couldn't get off the street because there were no cross streets for a space and I couldn't park because all the spots were full. When I finally got off Santa Monica and stated moving again the bike took forever to cool down. I would vote for lane splitting in a second. The drivers in California seemed to be fine with it as well. Here in the Midwest it would take them a little while to get used to the idea.