I read this too but there was no source on this. The founder Liang Wenfeng himself comes from Zhejiang university. Its admissions rate is 20%, which is much higher than traditional US "elite" schools. Wenfeng has said this about hiring though:
"If you are pursuing short-term goals, it is right to find people with ready experience. But if you look at the long-term, experience is not that important. Basic skills, creativity, and passion are much more important.”