This was debunked, at least in the UK. Not sure about the US but I'll bet it's the same sham (church sponsored) statistics.
I think more of each generation is coming to realise that religion is an outmoded parasite.
Sure, the concept of "spiritual/non-scientific belief" isn't a parasite in and of itself, but even if the existing organized religions ceased to hold their sway, and people treated religion as a personal thing without centralized authorities, I still don't see an end to (for example) people trying to get their religious beliefs enshrined in law. That's parasite behavior.