In some approximate calculations I did decades ago, prop Gyroscopic Precession can (sort of) be estimated. It DO exist, and numbers that fell out of those "studies" suggest it may be noticeable. - In CCW upright flight, an inside turn causes precession torque tending to yaw the nose out, and vice versa. Depends on RPM, diameter and weight of prop and a few other things.
Generally, the effect is small. However, I have two models that served as experimental 'goats.' Profiles - not a big thing to switch the elevator horn to the opposite surface. (Same thing as running UP line forward if you switch the horn to above the elev...) The smaller profile - an M&P Ercoupe - was very twitchy in yaw on hard inputs when UP line was aft; the larger - a Goldberg Shoestring - twitched less w/UP line aft, but the effect was still observable.
Our CLPA cornering is severe enough that I would rather not have to counter precession effects any more than absolutely necessary. Combining various trim conditions with a potentially hard, brief precession kick may worsen tendencies to "hinge." Thus, I've used UP line forward since. if it's only a feel good thing, so...?