Well, last year in August I messed up the ring and pinkie fingers of my left hand. Doctors told me it was Focal Dystonia (some sort of nerve disorder). So I had to stop playing guitar...

But I didn't want to! So this year, January 1st, I switched hands. Sure I sucked for a long time, but I was also taking lessons with a really good teacher (Tom Hess). A few months ago, probably in September or October, I can't remember which, I hit 600 notes per minute with directional picking. That means playing quadruplets at 150 bpm (with a metronome).

Now I can still play that fast, just a bit sloppy, because I haven't practiced much these past few months. I've been focusing too much on my teaching business.. :D

My usual clean speed is 400 nps if I want to rip speed. In order to measure this speed, I need to put a metronome to 150 and play triplets.

Does that answer your question?