He's become slower ever since Mathysse punished his ass. Danny is most likely half ruined after that fight, that's why he's fighting bums and avoiding anyone witha pulse atm.
Garcia has average hand speed. He is not slow, like Angulo. Against Salka he actually looked quite sharp, but against a speedster like Khan he looks awfully slow. Mind you, everyone looks slow against Khan. His feet are slow though, real slow. That extra toe of his (he has six toes on both feet) must make him plod
It didn't help him much because Herrera didn't get that close. He was jabbing a lot. Khan would stay in range for too long. Also timing does take some element of luck, your opponent has to do exactly what you predict and his chins gotta be where you think it is. Danny may not have been able to do that to Khan ever again.
Malignaggi? do you even watch boxing? This site is overloaded with trolls. He's slow because he's looking to counter.