The body responds on its own at times, no 'trying' involved.
So in a person who is well trained, I don't think it is a stretch to think that they can react faster than they even 'feel'.
Think about how you react to danger - hot stoves, stupid drivers etc - on automatic. When Tiger talks of adjusting, of 'saving' a shot, I certainly think he is letting his natural instinct take over - in fact we should all be playing that way - no try - just DO
react - like shooting a basketball
To ponder the timing involved seems unimportant IMO.
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