Lots of discussion on ethics (important!), but little in actual metrics. What actually are the precision and recall of systems that search over faces of the en

Lots of discussion on ethics (important!), but little in actual metrics. What actually are the precision and recall of systems that search over faces of the entire national population? I would have thought enough people look similar that precision would be inherently low (even as a human it is occasionally hard to tell people apart in photos), but the claims here (and in similar articles NYT has had on Chinese companies doing similar things) is implying near perfect numbers.