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.
My IQ according to the estimator would put me in the 99.995th percentile, but it seems to me that at least 5% of my friends and acquaintances are at least as smart as me. Part of this is probably selection bias, but I doubt that could account for it completely. I don't move in particularly exalted circles.
EDIT: If you had asked me to estimate my IQ before I consulted the website, I would have said 135. I'd probably still say that, actually. I'm guessing the GRE-to-IQ conversion is useless above some ceiling.
FYI, if you're in the median age band for Less Wrong, you misread the estimator -- I know, because I made the same mistake. Clicking "SAT to IQ" on the left shows a table for the test prior to a re-centering in 1995, whereas "SAT I to IQ" shows the table for tests given between 1995 and 2005. The latter's top end is much less exceptional.