Jonathan,
my Evo 6 is only 5000 kms (3000 miles), and I treat it with loads of respect (I never start above 3000 rpm, and I never side step the clutch or let it go hard - actually I don't care much about fast starts), so I do not think it is a problem with the clutch's life expectancy.
My prblem seems to be the same as yours (low revs when cold)
Maybe it is like that and we shouldn't be paranoid
Thanks again
Tarik