I think 'traditional or not' is up to each contributor to contribute and the DT staff to figure out. People shouldnt have trouble with anything that anyone posts, so long as it attributes fairly and is someones best attempt.
Whatever Dick, Max, and the other DT angels include is fine with me. I dont think anyone would begrudge them the final say after all the work they do, or get angry at them for a song they dont want included in the DT.
Bo
(I actually think the Historical Notes and background for songs is very often more important than the tunes -- my 2 cents)