Everyone has their own style I would assume. I've been on a PC for 25ish years now and I still type with 3 or 4 fingers almost all the time. I've tried to be more disciplined but I manage 100ish corrected WPM and it gets the job done, I never find that I'm limited by my typing speed.
Yeah, I can do 100-120 but that would typically involve something unusual like retyping something I already see on screen. Creative tasks are typically limited by something else. Formal typing classes in middle-school were useless, but over the next summer some form of touch-typing arose anyway from arguing with people on forums and newsgroups. ("Home row? I dunno, I just put my hands wherever feels right.")
I have no brain-scan science for this, but it feels like queuing up things into my touch-typing hands frees a different brain-circuit to think ahead a bit more, while at the same time their unfinished task keeps me from being distracted too far off-course.
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> "Technicians? I somehow pictured you putting all this together with your own hands."
> Yenaro spread his hands—pale, long-fingered, and thin—and stared at them as if surprised to find them on the ends of his wrists. "Of course not. Hands are to be hired. Design is the test of the intellect."
> "I must disagree. In my experience, hands are integral with brains, almost another lobe for intelligence. What one does not know through one's hands, one does not truly know."
