From the site:
EIN – You had worked with so many of the great soul singers so did the booking for an Elvis session cause you any anxiety?
W.J – To be honest with American Studios and the Elvis sessions, they were just plain recording sessions. The "Gods from Heaven" did not come down & there was no fire & brimstone either. It was just a recording session that just happened to be with Elvis. There was of course a lot more magic in recording Elvis than there was in recording a nobody but American studios had some great talent going through it at the time.