Good to hear that she has been successful in school through the fifth grade. At the same time, I would echo polarbear's cautions about changing expectations going up through the grades.
Looking just at the cognitive profile without any achievement data, if I were doing this evaluation, in addition to the vision and fine motor coordination questions, I would be asking questions about possible concerns in mathematical reasoning and spatial thinking, writing skills and written expression--especially handwriting, spelling, and lengthy writing. I would be interested in any disparity in length, quality, or efficiency between oral responses and written responses.
Depending on the type of follow-up testing recommended, you should be able to have much of it done at no additional cost, through the public school system of your residency, even if she attends a private school. You would need to write a letter requesting a comprehensive special education evaluation, with particular concerns in, for example, handwriting/fine motor skills and written expression. I would suggest speaking to someone in the special education department, and making your outside evaluation report available to them, so that
1) they don't repeat the testing, invalidating the second administration, and potentially causing eligibility decisions to be based on erroneous data, and,
2) they can see that you have specific concerns, even though she appears to be doing all right in school. Speed is of particular relevance as she enters middle school, where the work load tends to increase substantially, even when not in a selective school.
The extended norms are worth investigating whenever two or more subtests reach the maximum scaled score of 19, as this is an indication that the child may have exceeded the ceiling of the test, reaching the point where the typical scaling does not differentiate her ability sufficiently. Additional range for ten-year-olds can go all the way up to a scaled score of 22 for Similarities, and 25, for Vocabulary. So the difference between a low 19 and a high 19 can be as much as 2 standard deviations (you could compare it to the difference between a 13 and a 19 scaled score, which is the difference between high average and very superior).
