aalenik's post begs the important question: Is technical ability what distinguishes one as a superior guitarist---or singer, or drummer, or whatever? Or is it something some elusive, more abstract, more, dare I say it, artistic?
In the mid-70's I jammed with a guy who, when the subject of The Band came up (as it often does if I'm in a musical conversation ;-), dismissed Robbie Robertson's guitar playing. I knew exactly why, as I myself at first had. That was before I realized the musical contribution his playing was making to the song itself. This guy was talking about Robertson's abilities at playing a guitar solo, the yardstick by which he judged all guitarists. How small. I didn't waste my breathe in the hopeless task of raising his musical consciousness---that comes from within.
I have heard plenty of guitarists whose playing I find unmusical at best, downright ugly if not, that's right, vulgar, at worst. Others consider them virtuosos. At what? Not making good music, in my opinion. To admire their playing is to me like considering a fast runner a great dancer. If that makes any sense.