Yup, she will do great- it's wonderful that they caught this early! And if she is lucky, they might even be able to go in through the ear canal to remove the c-toma, rather than the 'big' incision behind the ear.
The first two days will be the roughest for her- make sure she gets her pain meds regularly, don't wait for her to be in pain. Once the bandages come off after two days she will be back to her old self! And she might not even have stitches, my DH didn't have them, just tape over the incision.
My DH had the surgery at Temple and they were wonderful, although I am sure you will probably be going to one of the children's hospitals.