[Wallace T.]

Without backup data, this article is meaningless. Are we talking about mainline Protestants, Catholics, evangelical Protestants, Orthodox, Mormons, charismatic and Pentecostal Christians, or whatever? What of regional differences and rural vs. urban vs. suburban?

[TonyinLA]

Catholics are by far the largest group and are supermajority of the active religious in this Country. The splinter groups are suffering loss of participation as well, but any empirical study of religious Americans is by default about Catholics just by the numbers.