It nonetheless results in significant presentation bias, what ever is the cause.

My priors, for one thing, were way off in SI's favour. My own cascade of updates was triggered by seeing Alexei say that he plans to make a computer game to make money to donate to SIAI. Before which I sort of assumed that the AI discussions here were about some sorta infinite power super-intelligence in scifi, not unlike Vinge's beyond, intellectually pleasurable game of wits (I even participated a little once or twice along the lines of how you can't debug superintelligence). I assumed that Eliezer had achievements from which he got the attitude (I sort of confused him with Hanson to some extent), etc etc etc. I looked into it more accurately since.