Well, I don't know how well I can explain it, but when you fingerpick fast, you want to move your fingers in a circular motion over the strings, kinda the same way that you do when you're sweeping with a pick. Use your thumb for the three lower strings, and your index, middle, and ring for the higher strings. When you do it right, it should look and feel like you're stroking the strings.



Ok, so maybe that explanation sucked. Hopefully someone else will come along and do a better job.