I didn't take the test. But the average person can't hear the difference between compressed and uncompressed audio. Especially if you have shitty speakers or headphones. I have hearing problems (tinnitus) so I can find it difficult to tell the difference unless I really focus my mind and hearing. But, I also don't really give a fuck either
That being said, there are definitely some groups I try to find uncompressed or higher bit rate for better quality. I downloaded Rodrigo y Gabriela a few years ago with the .flac compression. Holy shit, is that amazing to listen to. You can hear the individual picks and the subtle sounds of their guitars. Well worth the space on my hard drive.