Oh please? Hang in there and encourage you DD to do the same?
One of the, if not THE biggest down fall of gifted students is not being challenged, not needing to really WORK at much, then when they finally ARE challenged, it's like an axe between the eyes. It WILL happen eventually, better to be challenged early than go though and not be so until college when there is less support system around them and they're going through life style changes as well. This is why I cringe whenever I hear a school system that doesn't start gifted education until 3rd-6th grade, by then plenty of damage is already done.
A couple of things that helped our DS though the stage you're referring to:
1. Help them to understand that there is room in the world and even in their class for more than one "smart" person.
2. Help you child to understand that we each have our blessings and challenges.
3. Help you child to realize that the things they're most proud of they had to work at and often struggle through. (give plenty of examples they can relate to)
4. Always praise effort rather than results.
5. Praise attempts at something new / unknown.