Maybe I'm wrong, but being able to play musical notes on a guitar reallyfuckingfast may make you a good guitarist technically, but I can't imagine that it could really justify being a "great guitarist" or even a "good musician." Music is an art, and being able to play a guitar really fast is akin to getting a degree in art (painting). That is, you know what you're doing technically. You know what kind of sounds right. You know what people like in terms of stringing notes together. What that doesn't mean is you'll be able to create something great or new and different.
Here's where my personal bias really creeps in. I don't really like metal. (Music, of course. Metal, the substance (of course), is really important to our world. Don't get the wrong impression.) Sometimes it just sounds to me like the guitarists are just slamming their guitars for no reason whatsoever. People (not all, of course) prefer guys like Hendrix and Clapton because they're doing something you can grab onto.
Here's where my personal bias really creeps in. I don't really like metal. (Music, of course. Metal, the substance (of course), is really important to our world. Don't get the wrong impression.) Sometimes it just sounds to me like the guitarists are just slamming their guitars for no reason whatsoever. People (not all, of course) prefer guys like Hendrix and Clapton because they're doing something you can grab onto.