For about 2 years now I have been practicing off and on with picking with 3 fingers and sometimes with 4. When I play with 3, I go in this order= ring, middle, index, ring, middle, index(3,2,1,3,2,1) and with 4 I go pinky, ring, middle, index, pinky, ring, middle, index(4,3,2,1,4,3,2,1) I must say that in my own experience, playing with multiple fingers makes it much easier to play fast when you are playing stuff only on one string or if you are using 3 fingers for rhythms in 3 or 6 or using 4 fingers in rhythms of 4 or 8. However when you get into complex rhythms like 5 or 7, I find that it involves too much thought. Let me try and explain. When you play 16th notes, and you are using 3 fingers, it goes 3213 2132 1321 3213 so as you can see the first note of each succession which falls on the beat alternates like this 3 2 1 3 2 1. Now I do not find this very hard to do when you are just playing 16th notes on one string and are only playing 16th notes, but what if you want to change it up and play runs up and down scales and play in different timings? well lets say you switch to 5, it goes like this 32132 13213 21321 32132. now the beat falls on 1 2 3 1 2 3 so it reverses on you from when you were playing 16th notes with 3 fingers. if you think this is getting crazy, try dividing odd timing with 4 fingers! way too much for me to think about. What is so great about playing with 2 fingers in time changes is that the beat is only going to fall on one of two possible combinations. either it is going to fall on the same finger every time when the divisions are even numbers like 2 4 6 8, etc or it is going to alternate every other finger when they are odd 3 5 7 9 etc. So in conclusion, I find that yes, multiple fingers purely in the physical sense can enable you to play faster, but because it involves more mental power when playing complex lines, it doesnt necessarily mean that it will enable you to play faster. Now I haven't become proficient enough with multiple fingers to see from experience whether or not this theory is really true, so I would love to hear opinions from all of you multiple finger users!