Earlier quoted context omitted.
He is not faster than engines.
he is sometimes faster than engines. Engines are stronger than humans at slow time controls, but there are multiple GMs that can beat Stockfish at ultrabullet due to low depth.
It is true that chess engines are not usually designed to play in 15-30s games, however those ultra bullet examples games against the browser based versions which are much weaker and slower than the a dedicated engine process.