Question for the rod experts. Take three different brands of rods say a Cabelas brand, a Rainshadow, and a Loomis. If all three have the same modulus would one rod still be more sensitive then the others do to construction techniques, or would they all be pretty close in sensitivity?

Many things play a role in a rods sensitivity.. modulus is just one. Rod design (how the actual rod is built, guide alignment, spacing, thread, finish, guides) are just a few.
Blank companies don't tell you exactly how they build the blank, modulus is more of a consumer "idea" than a manufacture "idea" just like IM6 vs IM7. Which one is better? Hold up a Berkley "Buzz" IM7 and then hold a Rainshadow. Now which one is better? It's about personal preference, and feel, warranty, cost, QUALITY, etc.
I hope this helps..???

One of the biggest factors in evaluating a fishing rod is subjective opinion. Modulus and design both affect rod sensitivity. Which plays the greater role? Consider this: If we examine a group of good quality rods made of cane, fiberglass, and graphite, a group of experienced anglers is fairly likely to reach consensus that the graphites are more sensitive than the cane rods, and that the cane rods are more sensitive than the fiberglass rods. However, the materials engineers tell me that graphite has higher modulus than fiberglass, which has higher modulus than tonkin cane.

I think this suggests that sensitivity is largely intrinsic to specific materials, if experienced hands find cane more sensitive than fiberglass. Even low modulus graphite is high when contrasted with cane and fiberglass. I've not constructed graphite blanks, but I've watched it done at two places. My opinion is that graphite modulus is positively correlated with sensitivity, but specific design is what will maximize sensitivity. That is, it wouldn't be hard to build a rod with 60KK modulus that was less sensitive than a better design that used 40KK modulus. Therefore, all other factors being equal (which never are), a well designed rod of high modulus graphite has the material potential of being more sensitive than a well designed rod of lower modulus.

Nonetheless, at the extreme margin of excellent material quality, superb design, and excellent construction, you and I may not be able to tell, or at least appreciate, the difference. The upshot is, I'm not hung up about graphite modulus. And since the highest modulus graphite is so damn brittle, I'd generally rather have a well designed and constructed rod blank of a slightly lower modulus, knowing it will be more durable when I'm out in the boonies somewhere. I just hate breaking a rod when it's a three mile walk back to the car.

Sincerely,

Salmo g.

Hey thanks for the info, seems like there is allot more to it then just the modulus rating.

Thank you salmo.You just stated why I will not buy the top dollar rods in an eloquence that only you can muster.