I've flown with a few pilots who had mostly RW time. All were excellent stick & rudder pilots. Although the actual control inputs between FW & RW are certainly different, the main point of stick & rudder flying is being able to sense deviations from your desired attitude/speed/position very quickly and making immediate smooth & accurate control inputs to correct them before they're ever that noticeable. Once your S&R skills are well developed, they transfer pretty quickly between aircraft types. To give one example in fairly tame taildraggers: rudder/tailwheel feel & response is quite different between the J3 and C170. But when I checked out in the 170 after having flown the Cub, it took one or two takeoffs & landings to adapt to the different feel, whereas it would have taken the average 172 pilot quite a bit longer despite the many similarities between the 170 & 172. Most helo guys have very good stick & rudder skills both by the nature of their machines and due to the types of missions they fly. Transferring those skills to FW airplanes is fairly natural.

Order of stick & rudder skill demand/development, IMHO:

Modern Jet < PA28 < J3/docile taildragger < Gliders < Pitts/sporty taildragger = Helo.

I've found that most guys with time in the last 4 categories, especially the last 3, make very good stick & rudder pilots. Even taking the old Cherokee around the patch once in a while tends to freshen you up. If stick & rudder skills were all there were to flying a modern jet, I'd hire every helo pilot that applied. Obviously there's more to it than that, and a guy who's been flying a R22 VFR around LA could be as deficient in other important skills as a similar-background FW pilot.