It's not that hard. Hiring managers / hiring committees for technical positions at the big-5 are made up of peer engineers and managers (not recruiters or exec

It's not that hard. Hiring managers / hiring committees for technical positions at the big-5 are made up of peer engineers and managers (not recruiters or executives). So they hire the best person for the job because they're likely to be working alongside. I haven't come across situations where there are direct diversity incentives at the point where the hiring decision is made. Sure, there's probably indirect incentives, but I don't think they're as strong as your suggesting.