I've been in the industry for decades and interacted with thousands of developers over this time. I've never seen, met or heard a legitimate report of a brogrammer, being an immature, extroverted party going frat house programmer. It's basically an ESxP on the Myers-Briggs. That personality type doesn't get programming or design at all.

I have definitely seen this personality type in sales and executive positions though, also banking and finance, and among VCs.

But among programmers? No.

Now let's talk about why the US has fewer female programmers than Russia, China and India since that's not always been the case.

The work environment is the reason, and also pay. Hostile and confrontational gang-attack style interviews such as the person mentioned in his talk (and spoke out against) are a turn off for many, and women more than men. The writer walked out on the talk before he got to his point, but it sounds like, by criticizing the practice of gang attack interviews, and about to talk about attracting women, he may have been about to point out that fraternities that treat women as peers and respectfully end up with more female interest than fraternities that engage in gang assaults. Comparing recruiting to courtship is not a bad analogy. People don't like being abused and high quality people are going to avoid being in relationships, whether work or personal, where abuse is occurring, such as the many places that have gang attack style interviews.