the company i work fpr only makes fly rods so sencetivity isn't an issue taken into consideration in the course of designing a rod and i am not a rod design expert however if i was to attempt to make a rod with a sencitive tip for feeling bites it would be out of a high modulous high tinsel strength tip
the reason being is it would allow me to build a quickly responding tip with a minimum of material. but thats just the guess of a guy who cuts graphite all day with a razor knife not the guy with the experience and knowledge..