Did they break out the reading test and show the areas she scored lower on? My oldest son could read rather large words at a young age. However, he didn't always comprehend them. How is her reading comprehension? How is her reading fluency?
How is her writing? It's not just how nice she writes and how well she spells her words, but more about punctuation, ideas, voice, word choice, organization, etc....
As for the math, I'm inclined to think she's at the proper level.
Also, think about your daughter. Does she enjoy being able to NOT stress about her homework? How would she feel if she did receive specialized materials? Would she not like the teasing from other kids? Would she feel more pressure to be perfect (that can lead to stress and depression, my sister went through it and it was very sad to watch). And what if she starts getting the higher material and doesn't do so well? It won't be as easy to drop her down and her confidence could be shattered.
There's more than just a test score and a personal opinion at stake here.
I'm not judging, I'm just trying to point out as many of the different scenarios at play here. Sit back and really think it over. Try to take yourself out of the picture (again, not judging, we've all been there as parents; we want to talk up our child's accomplishments when that may not be what our children want).
If you really think she needs a different instruction level, sit down with your daughter and (without inserting any of your ideas, because kids pick up on that and want to do or say what will make mom or dad happy) ask her how she feels about school.
Then start researching the next steps, but again, if you fight for it you may get it and you want to make sure you aren't pushing your daughter into something that could become highly stressful for her.