The idea that experienced cyclists will wait in a line of stopped or very slow cars as if they were themselves a car is just ridiculous, and it negates one of the primary advantages of riding a bicycle in traffic. It's also very dangerous to ride in such a dogmatic way. There's a great danger of being rear-ended, for one. And then there's the problem of sitting there waiting as car, truck and bus exhausts spew their noxious fumes right in your face. The best policy has always been to combine vehicular cycling with common-sense defensive cycling. Yes to observing traffic signals and other rules of the road signage, but no to becoming another car in bumper to bumper traffic. I absolutely always go to the head of the line when I can, because that's the best way of being seen. "Splitting lanes" is not in my vocabulary, because I consider any available space to be fair game (except the sidewalks).