...top of my head here...
Using your sprinter analogy, wouldn't quick apply to events of short
or even negligible duration, and fast cover things that would be more
measurable? Agreed, both are subjective.... Hmmm. When cascabel
strikes, is he quick or fast? Quick, I think.
Amy's boss asked her to send him an updated report. He got the report in a minute. He said:
A. It was quick
B. It was fast
Which answer is correct? I assume "quick" and "fast" have the same meaning and both answers are correct. Is there any difference?