I agree with your test MDV... I recently had to master something I had mixed for a client. I was able to work on the mix for a full day without getting tired. The client came in for the mastering, and kept wanting it louder and louder, to the point that after about two hours our ears were shot. I explained that it was too loud and that was why our ears were fatigued, and asked why he wanted it so loud. His answer was that people want it louder, regardless of if it sounds better. In the end I got him to agree to let me back off the brick wall a little bit, but it's still way too loud to listen to the whole album in one sitting.
Like him or not, the Gotye
single is mastered in such away that all the dynamics are preserved, and you actually have to turn up the volume to hear the details - which is awesome.