If I was a woman interviewing at GitHub and then read this, it would absolutely influence my decision. I'd want to work there more.
There are two possibilities here:
1) Github has a culture of sexist workplace harassment
2) She is not telling the truth and Github is a perfectly nice place to work
In 1), I would be harassed, sure. I would then take care to document the harassment and file a lawsuit against the unrepentantly sexist company. I'd get a great settlement, Github likely has deep pockets or backers who do and would be desperate for this to go away. Cha-ching, cash in, and feel great doing it.
In 2), I'd have a nice job and everything would be cool.