From the public dataset:

165 out of 549 responses without reported positive karma (30%) self-reported an IQ score; the average response was 138.44.

181 out of 518 responses with reported positive karma (34%) self-reported an IQ score; the average response was 138.25.

One of the curious features of the self-reports is how many of the IQs are divisible by 5. Among lurkers, we had 2 151s, 1 149, and 10 150s.

I think the average self-response is basically worthless, since it's only a third of responders and they're likely to be wildly optimistic.

So, what about the Raven's test? In total, 188 responders with positive karma (36%), and 164 responders without positive karma (30%) took the Raven's test, with averages of 126.9 and 124.4. Noteworthy is the new max and min- the highest scorer on the Raven's test claimed to get 150, and the three sub-100 scores were 3, 18, and 66 (of which I suspect only the last isn't a typo or error of some sort).

Only 121 users both self-reported IQ and took the Raven's test. The correlation between their mean-adjusted self-reported IQ and mean-adjusted Raven's test was an abysmal .2. Among posters with positive karma, the correlation was .45; among posters without positive karma, the correlation was -.11.