Well, I was feeling quite discouraged when I first took the test, I wasn't hearing much difference whatsoever!

I'm in my mid 60s so some high end loss due to age, plus I played in a band for many years which didn't help.

Then I read the post from Josie so instead of listening through my studio headphones I listened through a really cheap set of phones and could get most of them. I think maybe because the cheap set really brings out the high end where the mp3 artifacts live?