I can't speak for throwawaymath, but the people I knew who went there generally were academics who had already done great things or from whom great things were expected. I don't have much use for the term genius, unless we're talking about Grothendieck or Witten. But yes, we're talking about people who stood out among the crowds of extraordinarily smart people in top tier academia, and who'd actually managed to _do something_ with their intelligence.
I think it's fair to say they were generally recruited via social networks. They knew what RenTec was, they knew someone who worked there (maybe an old grad school colleague or a former student), and when they reached out, RenTec already knew who they were. I don't know of anyone who went there who didn't already have a reputation in academia.
So contrary to astazangasta's original claims, they do seem to me to have something of a monopoly on brains. There are other smart people at other firms, but I don't know of any other place that has such a concentration. (Aside from Jeff Dean's office, I suppose. ;)
I think it's fair to say they were generally recruited via social networks. They knew what RenTec was, they knew someone who worked there (maybe an old grad school colleague or a former student), and when they reached out, RenTec already knew who they were. I don't know of anyone who went there who didn't already have a reputation in academia.
So contrary to astazangasta's original claims, they do seem to me to have something of a monopoly on brains. There are other smart people at other firms, but I don't know of any other place that has such a concentration. (Aside from Jeff Dean's office, I suppose. ;)