I don't think you can deny that shawn has a pretty amazing grasp of music and technical abilities, but at least to me it didn't sound as musical it could've been.
And I mean musical as in the more traditional sense, a more easily recognizable melody and rhythm, that's what sounds musical to ME.
I think the kind of rhythm shawn is putting out is just beyond comprehension for many people, that's why to them it's just noise, but it doesn't detract from its musical value in his mind.
But I'm a firm believer that without solid technique, you won't come anywhere close to being "the best", for example if you can write music like chopin but the fastest you can go is 2 notes a second then you're not doing yourself any favors. (in terms of being a good performing artist that is)
I would say the best musician I've ever heard on guitar is probably Guthrie Govan, perfect blend of amazing technique and music.