^^^I agree with much of what you said. But with the amount of influence Oprah has, she could have, bit by bit introduced books about science, evolution, rationality, and critical thinking on her shows. Some segments on debunking the scams, psychics and urban legends that disproprotionately hurt her prime viewers--lower income folks, women and minority people--would have been a public service, and let her keep her audience.
Instead, she has capitalized on silly new age crap like "the secret". I know it sells better than atheism, but don't the woman have enough money now? Controversy also sells, if it is packaged right, and Oprah is a genius at packaging. She could have shown how her own thinking changed as a result of exposure to rational ideas and the scientific method.
She is no fool, so I don't think she really thinks she is sucessful because of god or positive thinking or visualizing having money. She has to wonder why she is so well-rewarded but not the millions of people who have bought the secret book, or the poor girls at that school in Africa she funds.
Incidentally, I attended the Chicago premiere of The Color Purple, and helped to get some of the proceeds to go to local domestic violence programs.