"Responding to Richard Dawkins's pestering his fellow atheists to "come out", I mention that I am indeed an atheist. To count oneself as an atheist one need not claim to have a proof that no gods exist. One need merely think that the evidence on the god question is in about the same state as the evidence on the werewolf question."
Most theologies that I'm aware of might balk at the way McCarthy expresses that but, after clarifications all around, would emphatically agree. Indeed, the two are comparable. Faith is called "faith" for a reason.
Also, it is generally considered rude to publicly inquire about the details of another person's faith in such a confrontational manner as you've done here, however well you are intended or whatever McCarthy means. I think it is a safe bet - and he can correct me if I'm wrong - that McCarthy (and Dawkins) were encouraging personal choices, not externally pressured choices.
[That came off pretty condescending so maybe now I'm the horribly rude one. I hope people understand and agree with my intent here, though. Wrong question, wrong forum.]
It is worth pointing out that in my personal experience there is little to no correlation between intelligence and religious affiliation. John McCarthy is very intelligent and an atheist. Don Knuth is very intelligent and deeply religious. Martin Gardner was very intelligent, religious, and was very conscious of the fact that he could not logically justify his religious beliefs. I could give you more examples indefinitely.
Pointing to yet another intelligent person who is somewhere on this spectrum demonstrates absolutely nothing, and I believe that pg fully understands that. No matter what his religious beliefs are, for him to answer would only serve to potentially upset people who believe differently. Why go there?
Also the cause of that is far from established. For instance religious belief and ethnic background are strongly correlated, and ethnic background is more strongly correlated with IQ than IQ is with religious belief. How much of an effect does this have? It is hard to quantify.
Therefore I wouldn't put much weight on those studies. Don't pat yourself on the back too much for being an atheist, because it doesn't say much either way for your intelligence.
(Disclaimer. I am an atheist. But I know plenty of people who are much more intelligent than me who are strongly religious.)