I did peruse a copy that Dave lent me at a meeting a few years ago, and also heard him read excerpts from it. It seemed he was basing his conclusions purely on informal observation, and I had to suspect that his own biases shaped those conclusions. For instance, he suggested that people join skeptical groups in response to repressive religious upbringings or having been swindled, but my parents were atheists and never pushed any beliefs on me. Nor have I ever been swindled in a major way. I would say that the reason I'm in PhACT is that I enjoy exercising my intellectual powers, and so it's gratifying to find other people with whom I can engage in stimulating exchanges.