That's just dandy as long as
you are your main audience.
As a medium of communication to others what are you trying to say?
Music as the language of emotion allows for damn near everything because it's supposed to go beyond the reach of words.
"Wow! That dude can play fast!" misses the point to a great extent, although not entirely.
ETA
"Wow! That nerd can play fast.
As I stated playing fast is another aspect of being an accomplished musician. There are several (or many) different things that combine to make an expert musician, and yes I
throughly believe that being able to play fast is one, being able to play slow is another. Don't take my words the wrong way I did not say that playing fast shows that you are a great musician. Playing fast is just one skill set needed in the progression of becoming an expert musician. it takes many skills and talent to be considered exceptional or better than average.