I have taken the survey.
I'm almost exclusively a lurker. I don't visit meetups and don't read the Rationality Quotes threads. What I largely use lesswrong for now is the aggregation feature of the "RECENT ON RATIONALITY BLOGS" tab. I suspect I could duplicate this functionality with some combination of RSS Feed/blog subscription feature, but I'm unmotivated to do so and have convinced myself that the blogroll list curated by LessWrong is valuable. Hopefully my experience is demographically representative enough of a larger pool of lurkers as to be valuable.
My only two comments are one I made on that post inviting lurkers to post and this one, but I did take last years survey for what it's worth. Though I don't recall my answers to last year's survey, I suspect they line up pretty well with this year's. I wonder if there's any potential in the data to track how respondents answers change over time.
Started reading at Overcoming Bias before the split. Mostly following Eliezer's fiction, but also enjoying the deconstruction of human blind spots.