To be fair, the history of the RIAS is that it tends to skew high, especially in outlier populations (very high and very low cognition). Test developers attempted to address some of those issues in the revision, so a lower RIAS-2 score is not unreasonable, both from a norm obsolescence (Flynn effect) and test revision standpoint.
It's also not completely unlikely that your childhood score would not be predictive of your child's score at the same age. You report a score in the 160s, which would require either extended norms (which weren't released when you were a child), or the SBLM, which used a very different scaling system. If you were tested on the SBLM any time after 1980 or so, the norms were also fairly old at the time, which could also have inflated them somewhat. Comparisons of the SBLM to the SBV (which is itself on the aged side) find score drops of easily 15-20 points.
(I am not, btw, in any way implying that you are not an extremely bright individual, just that your exact numbers are not directly comparable to your child's.)
None of this, of course, addresses the issue of equity in access, when some children were admitted based on a higher-skewing test, and others are excluded based on a lower-scoring test.
I still think a WISC-V would be the best direction to go with this. Both the KBIT-2 and RIAS-2 cannot be considered comprehensive assessments.
She also is quite young, with a lot of inherent score instability simply due to her stage of development, exposure to direct academic instruction, and experience with school-type tasks. You may find that waiting a year, and re-testing with the WISC-V, will give you a picture of her learning ability in which you feel a higher degree of confidence. Also, in the event that the extended norms are a factor, they may be out by then.
And, big picture, regardless of the exact numbers, she is consistently demonstrating cognition well above her age/grade peers, which usually calls for adjustments to her instruction, in order to meet her academic and social needs. If she doesn't get into this specific program, that does not mean she should get nothing at all. I would encourage you to continue pursuing all reasonable avenues for adapting to her needs.
Please do not worry that she will go unnoticed and unsupported. The difference between her experience and your own is that you are her parent, and you will not let that happen.
