As I am learning and reading online forums a lot, I run into this one all the time:
"Fluorocarbon is more sensitive because it does not stretch"
In an attempt to
quantitatively compare features of different brands, TackleTour.com found out
fluorocarbon lines do stretch, almost as much (or sometimes more) than monofilament.
So, it is clear fluorocarbon
does stretch. This doesn't negate the fact that it might be more sensitive. It's just that the sensitivity does not come from the lack of stretch. So now I am seeing more pros on TV using fluorocarbon for crankbaits where before they would recommend mono.