[i]had absolutely zero effect on the ... driver's journey time.
This. People just don't see it like that.
Turning right from Palmerston Place to Chester Street yesterday. Three vehicles; car, me on bike, another car. Car in front heads off, gets to the junction with Queensferry Street, red light, stops. I roll along reasonably briskly but keeping well wide of the parked cars on the left.
Oncoming traffic means the driver behind can't overtake for a bit, but when she finally does get past the woman, driving an ENORMOUS white peoplecarrier thing, gives me a good old blast on the horn. And then she has to stop at the red light and I filter past both cars.
I did think about stopping and having a word but I don't think it would have had any kind of useful outcome.