Christian Female/Male Ratio

I have often wondered if there really were more Christian single women than Christian single men, or if it was just my imagination. According to the Wall Street Journal, there's a 60/40 split of Evangelical Christian women to men. Where have all the Christian young men gone? Suzanne Hadley explores this topic further in "Why Dating Outside the Faith is Illogical" and cautions against dating non-Christians because there are fewer Christian men than women.