His performance was insane. He had a 21 winning streak, multiple wins against top bullet players, 3141 rating high, last match in 35 moves: 0 blunders 0 mistakes 0 inaccuracies 15 centipawns loss per moves, and so on… By the way, just look how he did that performance:
wtf? this Video is insane. Carlsen did manage to Cakewalk to his title while casually sitting on a couch with his Laptop, hearing Music, chatting, drinking and havin like 10 people around him?