> If you accepted his claim that Google does pay genders equitably, then this would indicate a large pay disparity outside of Google.

Or it would indicate a successful outreach program at Google for women by which they were successful at getting qualified women not currently working in tech to apply; this doesn't necessarily imply a like-duties gender pay gap.

Could it indicate discrimination against men at Google?

There's a lot of variables which are not being taken into account there. If you hired a person from outside SV, and another from within SV, you immediately have a 40-50% difference in salary increases. Or, if you hire one person out of an advertising company and another out of a software company, the difference will be quite large.

It's also a bit of a weasely statement - to quote Penn & Teller, they are lying with numbers - since it doesn't mention the current difference in wages.