The recent Codeland conference in New York, which was geared to new coders, had no problem showcasing 28 amazing women speakers out of 40 presenters (or 70%), with one-third of the total being people of color. See Quincy Larson’s fascinating story on Medium here.
It was organized by Saron Yitbarek (founder of CodeNewbies) and was so successful that I believe the bar has been raised tremendously for tech conferences. I have been to dozens, but nothing like this. It was simply the best I’ve ever attended.
The energy, enthusiasm, and quality that was generated by such inclusion and diversity was proof that it works. And that was stunning. I’ll never be satisfied with a tech lineup of all (or mostly) white men, again.