The differences you speak of really are obvious and among experts not controversial at all. The open question is how much is environmental and how much genetic but usually people shoot down discussions of such topics before they ever reach this stage, flatly refusing to believe the data. And there is a huge stack of data in that corner, this is no refusal of one anomalous study but of the entire field of psychometrics at the very least.
The differences you speak of really are obvious and among experts not controversial at all. The open question is how much is environmental and how much genetic but usually people shoot down discussions of such topics before they ever reach this stage, flatly refusing to believe the data. And there is a huge stack of data in that corner, this is no refusal of one anomalous study but of the entire field of psychometrics at the very least.