I would like to know more about WhatsApp culture. Small team, incredible talent, unbelievable outcome. Pretty sure even Peter Thiel would consider them to be am

I would like to know more about WhatsApp culture. Small team, incredible talent, unbelievable outcome. Pretty sure even Peter Thiel would consider them to be among the "best startups". I think they give signs not to be this kind of cult, but they don't do lots of interviews, so it is hard to know. Anyone have a more privileged view on this?