I have read the same thing.
One thread states that you need stubs with a large enough groove for circlips, but wrx m/t's from 02'-04' had male stubs, that were held in w/ snap rings.
So my understanding is that the 04' STi stubs would work, because of the circlips, which would really make my life alot easier.
Of course I could just bite the bullet and buy half shafts...
I know this topic may be redundant to some maybe even most, but clarification on this would really be helpful.