I have notice that people repeat exactly what pg says and nothing else. I don't have a problem with repeating, but I think they also need to add to what he says.
I kind of carry around a formula: 95% copy and 5% innovation. Innovation should be low because it reflects taking a risk that by simply copying would mitigate. But, Innovation should never be zero as you effectively don't add anything to the community and become less competitive.
Currently, pg might have a set of belief that he has found empirically to be true. But if you consider the search for the optimal set of rules for forming a start-up, I think pg might have reach a local maximum and it is necessary for start-ups both in YC and out to search this space that defer from pg current views, so a new higher local maximum can be achieve for the entire community.(Think Particle Swarm Optimization)