I don't think I would say any of those groups act better than others.

As a driver, cyclist & pedestrian in London I second this. Some cyclists are dangerous jerks. Some car drivers are dangerous jerks. Some pedestrians have their heads in their phones and cause a danger to everyone. Rather than ranting about it, I'd prefer each user group to just be more aware of the others & take a bit of care.

That and make all London taxi drivers cycle everywhere for a month to see how they like it ;-)