Its interesting my folks live in Mississippi. My dad attends a very old methodist church. Very traditional. I would say the average age is 65 - 70 and the congregation is dying.
My Church has a huge youth ministry. The average adult age I would say is 35 - 40. It's a very young church. Where I live (Southern California) many churches are active youth ministries. It's become very popular here to be Christian. CHruch have made it a point to approach services with a youthful viewpoint. Look at the worship music. Downright Rock or Alternative!
Here in Orange County we have several mega churches - Rick Warren's SAddleback is one and my church - COast Hills is another. Churches are growing not slowing, at least here where I live.





