That`s a really good clip, Blasting. I particularly like the bit where the bass player and percussionist get their chance to solo. The only thing I`ve heard by these guys is a beautiful instrumental duet called "Summertime", which is jazz, I suppose, rather than bluegrass. It comes from this album :-
I see that DG has played with a lot of talented people in his time; you mention Del and Jerry McCoury, so this seems a good moment to ask if you`ve heard the wonderful Steve Earle and Del McCoury album, "Mountain" ?
PS. DG`s collaboration with John Sebastian sounds interesting to me. I`m going to check it out ...