Counterpoint: many of the world's fastest typists avoid using modifier keys (and prefer caps lock over shift for typing uppercase letters), because using them r

Counterpoint: many of the world's fastest typists avoid using modifier keys (and prefer caps lock over shift for typing uppercase letters), because using them requires careful timing: press the modifier after any other keys, press the key you need modified, lift the modifier. If you press the modifier too early or raise it too late, you screw up. In normal typing with no modifiers, it doesn't really matter when you lift the finger. You can afford to go much faster.