That's very interesting. I've never heard any of that stuff. The article I read in Rolling Stone was in the mid-80s and was specifically about Phil Keaggy, where it mentioned the Jimi Hendrix thing. I remember at the time being VERY interested in it and excited to see an article about him in Rolling Stone because I was a brand new Christian at the time and had just gotten his instrumental album
The Master and the Musician, and the album set
How the West Was One, with 2nd Chapter of Acts.
Of course it could certainly be possible that the Rolling Stone reporter who wrote the article could have been reporting that quote as factual when he himself might have been simply repeating in ignorance something that was already an urban legend by then. It wouldn't be the first time a reporter didn't check his sources. By this point the truth is probably lost forever...unless someone can call up Phil and ask him.