Even for classic time control, 15 minutes per move is too much; they get about 3 minutes per move on average: 120 minutes for the first 40 moves is quite common

Even for classic time control, 15 minutes per move is too much; they get about 3 minutes per move on average: 120 minutes for the first 40 moves is quite common. In this championship, they each had 100 minutes + 30 seconds bonus/move for the first 40 moves, which adds up to 120 minutes if they reach move 40 anyway. Of course, some moves are played very fast and the players do take 15 minutes, or more, in some tricky situations where they have to make a key decision.