Yeah, sure, he does 3 fingers almost all of the time, even in the slower parts... I do not like (to be honest, I think I do not need) to use 3 fingers all of the time, I just put my 2nd and 3rd fingers when they are really necessary, for example, that Spirit Crusher intro I play with 1 finger going down and up all the time... And also the verse parts, 1 finger only... But in the bridge I do use 3 fingers for that gallops there...
But going back to Myung, I do not like his style.. He's so "quiet", as someone else here said before... And those distorted solos are pretty "ugly" I think... But he is good, no doubt, I do not like only his sound, his technique is great surely.
By the way, what is your language??