Whatever one thinks of WICKED, and it's been debated here since this board and the show began, almost together, it does seem to work best with younger women. This is a story about college girls, after all. Somehow, women in their late 30's in those costumes look ridiculous. Youth isn't always in asset, but with a piece as clued into its younger demo as WICKED surely is, youth helps make a persuasive case for the material.
Sidebar: in a culture obsessed with perpetual adolescence, it's fascinating how the business routinely casts 30 plus year-olds (GLEE) as teens. I find it creepy. But maybe it lets the 30 year-olds at home holding onto their action figures and mom and dad's protective roof feel closer to the high school years. And less guilty about not growing the f--k up.
"I'm a comedian, but in my spare time, things bother me." Garry Shandling