John Gruber:

But last week’s ratio was so disparate not because the company didn’t pick enough women for speaking slots. Rather, it’s because the executives in charge of most of the products announced last week were men.[…]

So the problem is not that women are underrepresented as on stage speakers. The problem is that they are underrepresented in leadership positions. I would argue that it’s better — more honest — for Apple to allow its onstage diversity to accurately reflect its actual leadership diversity. If Apple simply put more women and people of color on stage, it would be a token gesture. If Apple puts more women and people of color on this page, more of them will appear on stage as a result.

I’d reference the article which spurred these comments, but I don’t think it deserves your attention.