He wrote The Book on rendering performance. Michael's super optimized x86 assembly routines for lighting and texturing is the reason we can run Quake on toasters.
Anyway, I don't think they should hire Casey. Specially after that demonstration of not understanding the big-picture and not being a team player...
yeah, i would be really sad if I was at the receiving end of this.
One guy is not 100% correct one day (because we overworked devs always are?), and the next day someone has written a blog text painting him as a subpar dev and now he is on front page of HN used as an example...