LOL . . I don't think even Nate could have convinced me it was John playing tonight.
Saw John with GPN 3 nights in a row in September and I was watching Divas on a projection TV that shoots a 4ft by 8ft picture onto the wall.  Didn't even cross my mind the guy might be John.  Until I saw Nate say it was Heart's bass player in the chat,  I figured they'd hired a studio musician to fill it.
Feel really sad for Cat . . it must have been very hard night for her.