For maximum speed, try making your picking motion come not from your arm, not from your wrist, but from your index finger and thumb. keep your wrist and arm in a fixed position, and hold the pick w/ thumb and index. To a certain extent the thicker the pick, the more accurate you'll be.
Then again, maybe it's just skill. I dunno. Ever see these bad mothas who play with their fingers? a lot of country, blues, and jazz guitarists can truly burn with their bare hands.
Any tips on incorporating fast playing into music that sounds good? (and i mean that as a joke). Sometimes it seems people (like me when i was younger) overlook phrasing and vibrato in favor of speed. Now i try to play tastefully, but it is nice to really impress other guitarists for a couple bars of a solo. Y'all make some recommendations.

Atomic