They like someone older to be on Broadway because (according to ALW) it would be impossible for someone so young to sing that part every night. But I would think 25 is okay so I don't really know...
"This table, he is over one hundred years old. If I could, I would take an old gramophone needle and run it along the surface of the wood. To hear the music of the voices. All that was said." - Doug Wright, I Am My Own Wife