Also, its interface with the game is simply more efficient. The APM managed superhuman control without using control groups; for a human player, not using contr

Also, its interface with the game is simply more efficient. The APM managed superhuman control without using control groups; for a human player, not using control groups at all would be an enormous handicap. The implication here is that the AI can select units and buildings arbitrarily much faster than humans can, and doesn't need to spend APM on creating and maintaining control groups themselves.