Speed can be part of the musical art, a form of sketching. Dey's is rhythmically spot on, as exact as the phenomenal drummer's pace (reminds me of Gary J. a bit), also harmonically innovative and melodically sure footed.

If mountain goats can leap and hang from the precipices, lighthearted with life at stake, its not above human musicians to play with perfection.

Consider Holdsworth and McLaughlin, immensely innovative, but fast!