Perhaps it takes a long time for cultural digestion of such concepts to find their accessible forms?

Intellectual development doesn't seem to be a matter of time so much as it is man-hours, if that division makes sense. I suspect that if Eliezer was a psychologist and/or educator instead of a computer scientist, we would be looking at a "rationality for the everyman" project instead of SIAI / LessWrong.

So, what we need is for someone to take the problem of "how do I explain rationality to actual people with limited time" and and work at it. HP:MoR is a start (it's explaining rationality to a subset of Harry Potter fans, at least) but it's not set up to give the right feedback.