There is some data to suggest that the RIAS reads slightly high, when compared to the WISC (more so to the WISC-III, less so to the WISC-IV, no data on the WISC-V).

It is fairly easy to give, though. No reason to believe it will be any less accurate than the KBIT-2 was, especially when comparing a psych intern to a guidance counselor (who probably had one survey course in assessment in grad school).

...pronounced like the long vowel and first letter of the alphabet...