At that moment it was like I was looking into a mirror. Only a mirror that only reflects your facial expressino and not exactly what you look like. Yeah.
I wouldn't go that far (I can think of at least a dozen off the top of my head who bury him in that regard) but he's great and the sloppiness is what makes Led Zeppelin good. "Tight" rock bands are usually shit.
If you were impressed by this, see if you can find video of Winslow way back in 1981 doing a dead-on impersonation of Jimi Hendrix (and his guitar) in the movie "Cheech & Chong's: Nice Dreams"