Lois McMaster Bujold "A Civil Campaign"Reputation is what other people know about you. Honor is what you know about yourself. Guard your honor. Let your reputation fall where it will. And outlive the ***
its different for every person. because it is dependent on your reflexes, sense of timing and rhythm, connection including latency, how quickly if at all you develop muscle memory, whether you are able bodies.. heck even individual age can contribute.
there will always be someone who will get it right away, someone who will get it with some practice, someone for whom it would take far too much practice to justify spending THAT much time on a video game and someone who will not be able to learn the execution at all.
as for post above claiming that you don't need it to clear content? false. you do. because even though mechanics are paramount, there IS a minimum requirement of damage that must happen in order for the boss to die before the group gets overwhelmed. being really good on a target dummy is not enough, but you still need to be able to deal a certain amount of damage WHILE executing mechanics. for harder content in the game - its not one or the other. its both.