At this point, maybe "extremely happy in school for the first time ever" is good enough? I guess I would want to know if my kid continues to learn new material. I think all kids have the right to learn something new at school. Does the school doing any progressive testing, such as MAP testing? In our situation, I feel pretty good if DS's test scores keep going up, especially in areas that he couldn't have learned through osmosis, because it means he's being exposed to new materials. I still get a little worried when he has the highest scores in the class, but since he doesn't complain, has lots of good friends, and he's still learning new stuff, I'm happy too.
I would investigate afterschool activities that are not taught at school, as others have suggested, in your DD's area of interest.
