Following debate over the use of the WAIS-IV Canadian adult norms that has been suitably addressed, this study examines the normative differences in the WISC-V child and adolescent data in three ways: (a) presenting a comparison of country normative data across subtest and composite scores for demographically matched and unmatched samples, (b) providing a review of Canadian-U.S. standard FSIQ score differences across ability level, and (c) comparing the case detection accuracy of the WISC-V CDN versus U.S. norms for children with intellectual disability and giftedness. Results demonstrate small mean differences overall in the WISC-V norms when comparing the standardization samples in the two countries; however, there are significant observable differences in the sensitivity of the norms in identifying case status. This is vital for accurate identification, and supports the use of Canadian norms in clinical and gifted decision making. These results support the use of Canadian norms when assessing these exceptional children following best clinical assessment practices and testing guidelines. (PsycINFO Database Record (c) 2018 APA, all rights reserved)