Threads like this are a joy for me. Intelligent discussion, and the audio files certainly provide example. I'm often one to say it is important to understand the science, but even more important to experience real world application.
After we consider environment, source, equipment and even our own auditory limitations, it truly becomes an analysis of ideals rather than reality. Being able to A/B audio files like these through various levels of equipment makes the laws of diminishing returns ever apparent.
It focuses the attention towards best reproducing what can be heard instead of believing there is something we are "missing".