Others have already pointed out the probable selection effects at work here, so I'll comment on the side issue of Nietzsche interpretation. Nietzsche didn't think atheism led to nihilism. Nietzsche thought that Christianity had stopped working in the modern world, so that trying to rely on Christianity led to nihilism. In people who were at least marginally reflective, Nietzsche thought atheism could be an effect of nihilism; he didn't think it was the cause of nihilism.
So, at the risk of starting controversy, I'm not exactly sure what the policy is about asking questions on philosophy..
But would you mind giving your opinion on Nietzsche? I just bought Human, All Too Human. It's a tough read for me, and I'm sort of plowing through it, though it's interesting and stuff.
So... what do you all think? :D
Edit: I changed it from "Rationalist opinion of Nietzsche". Better?