Meh, not sure I really buy that argument. I've never had a problem hiring in the US. And this is for a mid-tier, mid-size software company that most people have never heard of, not located in SV, and PE-owned (not much in the way of big bonuses and no stock options).
1/10 sounds in the ballpark - I think my ratio is better, but not by much. About half my interviews have been with candidates in India, half US, all for software engineering roles, mostly early to mid-career. Success rates weren't significantly different between the countries. Haven't had the chance to interview in Mexico yet, but we have an office there, so that'll probably happen soon.
