I got to hear Lillis perform at Harvard some years back; in fact it was a singaround and he was very gracious. He even offered a critique of my Gaelic (not irish) pronunciation, saying i was "overpronouncing" it 9which was true and I have since reworked the song to reflect this. He also gave an interesting talk/paper on sean nos singing, during which I asked a fairly naive question belying my "classical training" roots...when he answered it came off a bit arrogant but we talked later and he offered some wise words on finding one's voice and vocal style in traditional music (he knew I was a singer). I hope to get a chance to hear him again.