Re: Jon's question: is it easier for Americans to sing in Scots? I don't think it is as a rule: I thought maybe I had a slight edge with my literature background because I got used to reading earlier forms of English. I also sang a lot of choral music -- stuff like Benjamin Britten's Ceremony of Carols -- which taught me about permutations of vowels.

I never put on English accents (well, hardly ever -- I wouldn't anglicize "Bonnie at Morn.").