I took the GP for asking why there might even be differences in the first place, and answered that question directly. The question as to whom it might impact d

I took the GP for asking why there might even be differences in the first place, and answered that question directly. The question as to whom it might impact differently and in what way takes a critical survey of research, of which much has been done. With the output of that research being contentious and hotly debated, I have no interest in trying to summarize that here even if it was what I read the GP to have asked.