I just hope Gracie's body doesn't change much. Look at Mirai she is much more stocky then when she was Gracie's age. But luckily Gracie has much better jump technique so she may be all right in the future.
A lot of is also about WHEN you grow too...
Here's Gracie in September 2009 when she was a novice — http://www.youtube.com/watch?v=wg8UyTVaNHU
Here's Gracie a year later in Skate Detroit 2010 (junior) — http://www.youtube.com/watch?v=QDDWMKn9Npg
Here's Gracie at Skate Detroit 2011 (also as a junior) - http://www.youtube.com/watch?v=JEG7zOTuiSU
In this progression of videos you can see that she grew a lot between 2009-2010, but not much between 2010-2011, which tells me she's done growing for the most part.
You can also see how far she has come in just one year (between 2010 and 2011).