Haye's fight is a good example- 12 rounds, three judges- out of the potential 36 round, not one round was given as a drawn round.
Some certainly should have been.
Are judges discouraged from scoring rounds as a draw nowadays?
I've noticed, however that is IS common to score rounds a draw in "prospect V journeymen" type fights, if it's a round that the journeyman looks to have won/dominated.