Ok reading this article is misleading regarding the quattro....
It says 100% of the torque can be available at the rear, correct. Then it says 50% of the drive is minimum to the rear?
Now what does it mean? To me it implies the rear wheels are always driven and more power than the front can be sent there.
Does this mean the haldex is set up in reverse? E.g the rears are always driven and then the fronts are feed power/torque when necessary?
If that is true that is way cool, but I doubt it very much.