No, they do, and are usually pushed into it by prayer retreats and a forced lack of sleep (in the stories I've heard.) It's after they fake it once in order to sleep, then get into the habit of faking it, that they decide that they were never actually faking it, retconning the first incident into an awakening.

It was once only tiny pentecostal sects that did this (speak in tongues), but evangelical churches grew out of that tradition and took over the world. Literally didn't exist 100 years ago. It's also where we got faith healing and snake-handling.

edit: Again, barely older than Scientology or the Nation of Islam.