well, I consider an experimental guitarist a guy that sounds like **** and puts it on the account of experimentation (VAI with 'alien water kiss' for example) Why would sco be experimental? What he does is melodic and has power, and most of all, it doesn't make you want ot turn it off...
I agree that some people really push the boundaries of the instrument and its sonic possibilities, but it's not always (far from it) great, let's take the album Pat metheny did, 'zero tolerance for silence'... Uuuuuuuh?