http://www.dailykos.com/storyonly/2006/7/10/933/94851The cost of declining social capital.
This is what I have often noticed in my students. Those who attended church or a similar religious institution usually had better literacy, better skills relating to people of all ages, and a larger range of experience generally than people of the same socio-economic class who didn't attend church. It has little to do with the religious aspects (beyond an understanding of common purpose) and everything to do with social capital.