Uh huh. Don't know a lot about him, but that's what I've heard.
Btw, that video of the 3 of them? It doesn't look like any kind of performance, more like they were all staying at the same hotel and decided to have a jam session in the lobby.
Jam sessions are 90% of the fun. I have got to jam with several of the greats in bluegrass/newgrass. Something you don't really have the opportunity to do in the other genres.