Chris,
What does her reading look like? If I only had my oldest, I'd say that reading jumps quickly in gifted kids, but I've seen it go both ways. Dd12 went from Henry & Mudge to Harry Potter in a matter of weeks, but things were more in jumps and periods of stagnation for dd10.
Are they exaggerating about her reading in comparision to other incoming 1st graders b/c they aren't in support or do you really feel like she isn't reading at a 1st grade level? I would probably only agree to move a child ahead a full grade if she'd be above average in all areas. It is a much harder fit when the child is hugely advanced in some areas and more average in others. I'd be more inclined to push for subject acceleration of maybe multiple years if reading was not advanced and math was very advanced. Is that a possibility?
