He's one of the best programmers you can get (in the world) when it comes to networking and friends. Gwan is less known around because it's not OSS but I believe still achieves unmatched performance.
This interview must be some kind of a mistake. It's like testing Richard Feynman's knowledge with questions about multiplication table (where you have wrong answers on your table).
It's so stupid that it's almost not possible to laugh.