From the NCC's 2008 Yearbook:

Jehovah's Witnesses and the Church of Jesus Christ of Latter-day Saints, regarded by many Christians as cults, reported the largest membership increases in a year, according to the National Council of Churches' 2008 Yearbook of American & Canadian Churches.

churches are feeling the impact of the lifestyles of Millenials – people in their 20s and 30s – who attend church but resist becoming members.

I can't find the reference now, but I read yesterday that changes in church membership numbers aren't actual ("real") but are simply Christians switching denominational affiliations.

Switching sounds silly to me. What's to be gained by it?