Those reaction times are very much the lowest common denominator.
1.5-2.5 sec is a really slow reaction time, especially when startled. Thats a 1500ms ping time![]()
You never know how quickly you are going to react - I've had times I've surprised myself how quickly I've reacted other times, especially when something is unexpected, I've frozen for a second before my brain comes up with a way of processing what I'm seeing and sometimes you are aware of other factors which stop you just instinctively reacting and braking.
It is one of the reasons it is a good idea to drive defensively and leave a reasonable margin for error as you never know when someone else might freeze up in the moment and not make the decision logic dictates they would, etc.
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