There's something seriously wrong with those girls. They're f'ed for life. Most of them will never grow taller than they are now, and have problems with puberty, etc. because of the training. I think the limit should be put to something like 21 so they at least look like they're 16-17.
It's harder (IMO) to distinguish age with the asians, but the American Shawn Johnson is amazing. She honestly looks like she's 11-12, yet she's 16.