IME the "unique backgrounds" are "doesn't have a CS degree or a couple years of experience at a big software shop".
Try "the interview process is bad and has low recall."
> sooner or later, it will matter to you.
It already matters to me.
discrimination can either be legal or illegal. google legally discriminates by giving offers to those who get the hiring committee's approval. i think getting the hiring committee's approval is a form of legal discrimination.
Right, every nonrandom decision is discrimination, but in the US private discrimination is generally legal unless it effects a protected category; because of the rational basis test, in the US, public dsicrimination is generally invalid unless it meets some bar of justification, but unless a particularly protected basis of discrimination is involved or a particularly important right impinged, the bar for validity is very low (a rational relation to a legitimate government function.)