I don't think ATTESA makes any difference when you're doing a high speed run. It's not like the car is continuously having to transfer power to the front wheels to compensate for any loss of traction.
The HICAS on the other hand is something you have to get used to because changing lanes at high speeds or simply taking long sweeping bends doesn't require much steering input. That doesn't mean that the steering is light, in fact quite the opposite. Once you're used to it you'll be surprised with what you can get away with.
Anyways, this arul kanda guy probably regrets posting the video. You Skyline owners are so vicious. :reddy: In order to make him feel better, I've found another video which makes his video seem normal.
Enjoy:
subaru sti vs skyline gtr r35 2008 - YouTube