The expectation appears to be that extended norms for the WISC-V will be developed at some point in the near- or mid-term, so I would make sure you have access to all the raw scores, in case the extended norm tables are released in the future.
ETA: Actually, I'm reading now that the WISC-V extended norms have an anticipated release date of late this year.
The psychologist who administered the test allowed me to take a picture of the score sheet which contains the raw scores. My DS did not reached the natural ceiling on those subtests. I will be sure to ask questions on how to figure out the extended index scores when the extended norm becomes available for WISC-V.
Thank you so much for your explanation and clarification.
