Re: controversial bro-grammer ?
"The percentages of successful women in engineering versus men does at least correlate with the theory that women are less suited."
No. It correlates with the theory that the men who get appointed to the senior posts are less likely to appoint women. And that women are less likely to be appointed to the senior posts that do the appointing of junior posts. A view supported, in part, by the the fact of people posting here who believe that women are intrinsically unsuited to engineering.
The same holds true for ethnic minority appointments. But here there is objective proof available, because of the oft repeated studies that show how applications with an Anglo-Saxon name are more likely to get interviews than those with "ethnic" ( i.e. non Anglo-Saxon) names on the identical CV.