Every type of IQ test (including Ravens Progressive Matrices), the Civil Service and Armed Forces tests, the PSATs, SATs and ACTs as well as the many graduate school qualifying tests. They are all in agreement. We've been over this before.
On a hunch I googled unequal median aptitude and he is the first person to put those words together. https://www.google.com/search?q="un...41LTGYAQCgAQHAAQE&sclient=mobile-gws-wiz-serp
Median is more relevant than mean in such cases because it doesn't overweight outliers. Median plus SD equals a distribution curve so the statement was correct.