As a daily commuter in the Bay Area (~7m population), I agree with you wholeheartedly. Far less action in the left lane than any other lane.
Only thing I'd add to this article, which may seem like it goes without saying but I'll voice it anyway, is to resist the urge to road rage. You get cut off, someone does something stupid, and sometimes your first instinct is to tailgate or otherwise "intimidate" the driver. This is stupid, unsafe and illogical. A car is bigger and will win. Every time. I say this because I myself have done this in the very recent past (ie, yesterday) after getting cut off and very nearly taken out by a shithead driver in a fancy little Beemer. There may be a YouTube video out there of me riding behind a car with my left arm fully extended, hand upright, giving the biggest one-finger salute possible for quite a few miles. After I got to work and calmed down, I realized I need to resist such stupidity, as it could be the end of me some day. Around here, flipping someone the bird could result in them simply slamming on the brakes and that'd be the end of things. Not worth it. In short: calm. the. eff. down.