A startup I once worked for sent out a memo asking that HR be involved before rejecting a "borderline" female candidate. As a generally apolitical junior employee this seemed really concerning -- we had pretty strict hiring standards and from that point on I wondered if each new female employee would have made it if they were born male.
I can't say if Google's practices are discriminatory (I don't really know what they are) but it's a very important thing to have open, honest discussion about. At the time, I kept my mouth shut because I was pretty low on the totem pole. If I were an employee at Google I would now know to do the same.