Probably in the 110 range. The average programmer IQ is 110. And I don't think the average HN user is better than the average programmer.
You have to figure that from 85 - 120 (depending on the scale) is a huge chunk of the population.
Considering that the average HN commenter is involved in programming in some fashion, and that programming is practical math in some fashion, it does stand to reason there's a higher floor.
But that floor is lower than you might think. In IQ in the 125 range is sufficient for every task on the face of the Earth. You can perform any mental task. That's mildly gifted or above average.
