guitar hero is helping me use my little finger more.....ducking and running
I'd say that's a valid point. It helped me out alot as well.
I think part of it is just kinda like a nervous twitch, or a natural muscle reflex or something. When I start to try to play faster and faster, I start to squeeze the pick more, picking hand starts to creep up towards the neck, and I would love to see a movie clip of my face as I do it, because I know my mouth starts to open, my tounge starts to stick out a little and my eyes get big. I can feel that some of the muscles tense up in my body too.
I've been working on this triplet run. I started out at around 100-110 BPM. That was about normal to me. Trying to go up to around 125 or so was too fast, and those things would start to happen. My hand creeps, I tighten up on the pick, etc... As I practiced it (which I have done ALOT) it became easier to play. Now, 125-130 is normal, or easy. None of those things happen to me now while playing it at 125-130. I feel completely comfortable doing it at that speed. Now, 145 to 150 is fast for me, and those things happen in that range.
I'm sure it feels normal/natural for Yngwie to be flying up and down the fignerboard.
My point here is that I think you need to slow up a bit and play it over and over and over. I think you should feel comfortable playing it at the speed you want. When your pinky starts to lift up and away you're reaching your breaking point. You're playing as fast as you can. Practice so that that same speed isn't your fastest any more.
Also, another view is to slow it up and concentrate on not lifting your pinky, like you said you do. And you noted it's very hard to do? You have to concentrate more on the pinky than playing? That's good. That's what you should be doing I think. You have to find the hard parts of what you are trying to do, pick them out and practice them over and over. Concentrate at first, but once you get so many repetitions in, it'll be natural and you won't even be thinking about it.