I'll start this out by saying that I have an IQ that falls, depending upon which of eight different results you want to look at, somewhere between really high and astronomically high. Considering that I'm a secretary, I fail to see how useful a high IQ really is. Opportunity is a useful thing, access is a useful thing, but an IQ above average isn't really all that useful.
I'm also suspicious of IQ measurements as a whole. There isn't a great deal of consensus as to what exactly is being measured, for one thing. There is a certain cultural bias to IQ tests. Also, while there is a tremendous amount of difference between the capabilities of people at the extreme high and low ends of the scale, there isn't much appreciable difference between the capabilities of people at the average and high ends of the scale. I'm not really sure why we bother to measure IQ at all, other than the fact that people really like numbers a lot.
For example, take a look at the above graph, describing IQ by religion. I suppose I could crow about atheists falling at the upper end of the graph, but look at the range described: 113.43 to 101.89. Don't feel bad Pentecostals, that's not much of a difference. In fact, given that my own IQ varies as much as 25 points depending upon which test result you look at, a range of 11.54 doesn't mean a thing. Basically, IQ doesn't vary according to religion.
Anyway, that's my thoughts on the matter. I don't know what the difference is between believers and nonbelievers. I don't think it's intelligence. I've known some very foolish atheists and some very intelligent people who believe very foolish things. Whatever it is, smarts aren't in it.
