Finally, it's not a double-digit improvement, but of course we can quibble endlessly over how meaningful that exact number is, but it's irrelevant. The number is still piss poor compared to undergrad enrollment, indicating that women don't pursue higher math degrees for various reasons.
The link I initially provided cited evidence that they're interested in undergrad maths because of opportunities it provides outside of pure maths. It's not apparent that similar opportunities exist for CS undergrad degrees, which would be one explanation for the disparity in undergrad math and CS. So I'm still not seeing how anything you've said bears on this at all.
Certainly graduate maths have more women than does CS. So what? What exactly do you think this proves in light of the above?