A lot of online communities pay lip service to the idea that their experiences aren't universal, but Less Wrong seems to be one of the few places that takes that idea seriously.
This is actually one of the things I am both positive and negative about. I think people are far more similar than sometimes assumed here. The evidence is pop culture. How could something be as popular as Star Wars or Metallica if not for calling out to a very similar underlying emotional hardware in people? In a No Mind Is Typical universe there would no universal mind product - there would be no hugely successful bands or movies just thousands of mini subcultures with mini stars.
One of my most surreal moments of How We All Are Really Alike was reading a...
My favorite is that people get credit for updating based on evidence.
The more common reaction is for people to get criticized (by themselves and others) for not having known the truth sooner.