"Ragtime's" opening is really dependent on the cast. I've seen it done wonderfully, but I've seen it done BADLY. And, nine minutes of it being done badly makes you forget how truly brilliant it is when done well.
Love "Fiddler's" opening and "West Side Story's" as well. It's not too long, but it's not short either.
Some people paint, some people sew, I meddle.