I totally agree that it can easily be counterproductive and a very expensive way to nowhere. Like I said, I was honestly curious and I don't know all the answers.
I guess I was thinking along the lines of Grumpy's mantra "Match your cam/heads/intake" and a properly matched setup with max power at higher RPMs can deffinately benifit from 1500-2000 extra RPMs. Correct me if I'm wrong, but I think forced induction(especially turbos) are a whole different ballgame.
Thanks for that link, BTW. I'd seen it before, but now it's bookmarked.