Hmm... maybe if I'd been using speakers I could tell the difference, but since it's night, I'm restricted to my headphones.
Couldn't tell the difference here, but with full music tracks, at least the ones I listen to, I can tell the difference between a 128k version and a 192k version, even with regular, cheap headphones on my mp3 player.
I'll check it out again later, when I can use my speakers.