In the end, Carlsen is the man who knows the best how to win in chess. Regardless of all critics. He played the 12th game safe knowing he's a huge favourite in rapid and blitz. Like Kasparov and Grischuk pointed out today, every other chess player gets worse playing rapid/blitz but Carlsen is the only one who actually improves. Under these conditions it's more than sensible to move into the terrain where you have an…
In other sports we have rules against playing to draw/stall (e.g. see delay of game in hockey). Likewise in chess (or this and a number of other tournaments anyways), we have rules against agreeing to draw within the first 30 moves to attempt to discourage this sort of behavior.
Not only did Carlsen not play to win the game, he didn't even play to win the championship. Instead he chose to draw, explicitly deciding to split the prize with his opponent.
I, for one, am highly unimpressed.