Based on the 352 self-reported Gestalt scores, we get the following IQ distribution of Pumpkin Person readers.
We could simply calculate the mean and SD, but given the ceiling bumping (26% got a perfect score) it seems wiser to convert each IQ into a percentile and then a normalized Z score with respect to blog readers.
IQ 74 = 1.13 percentile = -2.27
IQ 90 = 4.39 percentile = -1.73
IQ 98 = 8.225 percentile = -1.4
IQ 106 = 17.6 percentile = -0.93
IQ 114 = 29.68 percentile = -0.53
IQ 121 = 47.15 percentile = -0.07
IQ 129 = 67.04 percentile = +0.47
From here we get the following line of best fit:
y = 122.61+19.546x
The Y intercept = the mean and the slope = standard deviation.
Thus I estimate that on a scale where random whites score 100 with an SD of 15 my readers have a mean IQ of 123 with a standard deviation of 19.5. Such a huge SD is a bit hard to believe but it could be because IQ blogs attract both geniuses and the mentally impaired, thus pulling the curve to both extremes.