I've not seen the uTube thigie on my ancient dialup soundless computer, but I've heard the duo on the radio and it always astonishs me. I adore John Prine, I love this song, but Iris DeMent's voice by itself is second cousin to nails on a blackboard for me - I can't turn the station fast enough!

It reminds me of an art school exercise we were given, where we had to take a color we loathed and design something with it, finding colors that gave it style and setting. I can understand how that can be with voices that grate as well - put them in the right setting and they shine.