None of it really makes sense to me. The only thing I can find on the RIAS is that it correlates something like .6 or .7 with the WISC (which means the two scores could be very different). Yes, I agree that brief testing is limited.

I met the school psychometrist, and she's kind of a quiet mousy type. I'm not sure DD6 would respond well to her, and maybe that explains a lot.

Yes, at least her achievement tests were high, and her work samples wowed them. I guess that was enough to show them what she could do.