Thanks! That's the best Fratres performance I've yet to see (the "wincing frisson" in her facial expressions) -- but this Gidon Kremer performance from 1984 is the best I've yet to hear: https://www.youtube.com/watch?v=DmUE8b5kAQ4
Gosh, Fratres still makes me feel the same way as the first time I heard it (from KQ's album Winter was Hard). Its gratifying to see so much Pärt love here and the article was a nice read to gain a better understanding of the theoretical and historical context of what I previously appreciated in a naive manner.