In order to see if both parties are a "match", you have to have at least one physical encounter in the form of a try-out.
If you're out of the "danceworld" for a year, and have competed with such outstanding results, it will take a lot of training in order to get back to that again, but it's not impossible. Dancing is like riding a bike or learning how to swim: you never forget
Don't let the fact that her dancefriends are "further up" discourage her, it should be an encouragement for her to get back to dancing! 
When you are dedicated and have a goal, anything is possible: When you can dream it, you can do it.
"Carpe diem, quam minimum credula postero." - Horace