Oh I know him (and he's quite lovely

), and there are even some videos I found of Yngwie Malmsteen doing shred-esque playing on an accoustic (!).
But it's at least twice as hard and the result seems less intriguing, besides the fact that a lot of things probably won't work at all

It's a bit like trying to get natural (or even pinch ;x) harmonics on an accoustic guitar.
Try holding your finger just on a string over the 12th fret of an accoustic guitar and plucking it (preferably releasing your fretting hand just after for maximum ringing), you'll hear a harmonic.
Now on an accoustic it's bloody hard getting more natural harmonics like this one out (at, say, the 7th fret (or 19th), 5th fret (or the 24th), the 4th fret, and somewhere around the 3rd and 2nd frets - where there are about 5 different natural harmonic notes close to eachother); however, pick up an electric guitar (or even bass

) and you'll notice it'll become increasingly better audible (is that proper english?

) once you turn up the distortion (and possibly the tone knob).
The same goes for things like pinch harmonics but also for techniques like really quick tapping or sweep-picking (and what other techniques are normal or abnormal in shredding nowadays..I really don't know) where you just won't (easily) get a lot of sound on a clean (let alone an unamplified) guitar sound.