Not that i doubt any of the stories per se - but in maybe a dozen shows seeing Rory right up till the early 90's , he ALWAYS used cables - albeit long ones. Stories on that link from the 80's (before there were wireless kits for guitars - or before there were many, anyway) about him going out of doors, up stairs, round the back of venues etc... it seems improbable, given the tangle that would occur, even if there was a spare 50m of cable.
Maybe memory clouds they years, and his all over-the-stage-show got beefed up a bit.