The final straw was noticing a comment referring to "the most recent survey I know of" and realizing it was from May 2009. I think it is well past time for another survey, so here is one now.
I've tried to keep the structure of the last survey intact so it will be easy to compare results and see changes over time, but there were a few problems with the last survey that required changes, and a few questions from the last survey that just didn't apply as much anymore (how many people have strong feelings on Three Worlds Collide these days?)
Please try to give serious answers that are easy to process by computer (see the introduction). And please let me know as soon as possible if there are any security problems (people other than me who can access the data) or any absolutely awful questions.
I will probably run the survey for about a month unless new people stop responding well before that. Like the last survey, I'll try to calculate some results myself and release the raw data (minus the people who want to keep theirs private) for anyone else who wants to examine it.
Like the last survey, if you take it and post that you took it here, I will upvote you, and I hope other people will upvote you too.
I'd agree with that statement, revising it up to at least 95%. Once you've got it down to more than 19 in 20 people you meet being obviously-dumb, it's worth the effort to inspect the others more carefully, since it's always good having really smart people around.
I'm much more familiar with people thinking 95% is an orders-of-magnitude higher estimate than 80%, and so I tend to adjust others' carefully-thought-out estimates outward rather than inward, unless they are 0 or 1.
ETA: It's worth noting that one of the huge signals smart people give off is the "OMG you're talking about something that requires intelligence I'm so happy to have met a smart person because that happens to me less than 5% of the time" reaction, which if rarer than I think would significantly throw off my estimates.
Seeming "obviously" dumb and actually not being in the top 5% are very, very different. A person might just be tired, or stressed, or distracted and so not exude intelligence. Or, they might be acting a little less intelligent than they actually are, maybe for social reasons.