The China gymnastics team age controversy

So in case you read the news etc., you've probably heard a lot about the age controversy about the Chinese women's gymnastics team.

There's He Kexin, who is winning all sorts of medals. How could that girl be 16? I would honestly say she looks 14, like an 8th grader. And in the picture of the three girls, Jiang Yuayuan is the one on the left. She's even missing a (baby?) tooth. 

On the other hand, these girls could just be really young looking. Gymnasts tend to look young anyways, I mean, Shawn Johnson from the USA is very young looking (Below).

You must also consider the fact that these girls are Chinese. Chinese people tend to be smaller, and usually look younger as teenagers. I've noticed in my school that some of the asian freshmen look like 12 year olds.

SO anyways, what do you think?