This from the article you linked sums it up the best
So what should you remember from Part 1 of this article?
   1. With an open diff the torque split is always fixed by the gearing of the planetary gearset. With the STi, it is 65R/35F.
   2. When the diff is locked the answer to “what is the torque split” is: It depends. It is not always 50:50.
IT DEPENDS ON THE LOCKING RATE 
 http://www.purepwnage.com/media/Kyle...ng%20noobs.mp3
http://www.purepwnage.com/media/Kyle...ng%20noobs.mp3
good track