Also you can notice that picking style from some concert clips , go search for some on Kazaa .
The main advantage of finger movement picking is the relaxed comfortable playing at higher speeds , but that doesn't necessarily means that picking from wrist is bad (John Petrucci picks from wrist exclusively)... Effectiveness of picking comes from less motion wether you pick from fingers,wrist or elbows , but when you move your fingers , it takes less momentum and energy , thus easier and more comfortable.
Don't be so nervous or force yourself so hard to pick from fingers , it's all about being comfortable ... Also , people who are mainly using finger picking do some wrist or elbow picking sometimes.
