Actually, I'd say Sean McCann sang about as much as Alan did. For example, he did the lovely title ballad from their new album, Safe Upon the Shore. Bob Hallett even sang lead on one song, though he's mostly known for playing an incredible range of instruments.
All in all, this is high energy, Celtic-influenced music that had the crowd up on their feet clapping and tapping their toes much of the evening. My one complaint is I, for one, have not memorized all of their lyrics, limiting how much I could sing along, even when Alan was sort of demanding it. Actually, I do have other complaints, but not musical ones. I found the lighting to be painful at times - bright and right in my eyes as I was sitting fairly far forward in the center. And I forgot to put on mosquito repellent.
How do you say "l'aissez le bon temps roulez" in Gaelic or Canadian?