She'll be fine. What type of board does she have? As long as it's not a really stiff board she'll be good to go. A stiff binding creates more response with minimal effort. This is a problem with beginners. They tend to over-think things causing them to overcompensate. For example, they can't get a toeside turn down clean so they think pushing into it harder will work. The stiffer the binding, the less you actually have to push to get the needed response.
It's not a huge deal. In fact, it'll probably make her a better rider. It'll force her to concentrate on technique.