While theoretically true, the numbers do not lie. The angular momentum of the prop alone and the applicable geometric (dis)advantage are just not enough to sign

While theoretically true, the numbers do not lie. The angular momentum of the prop alone and the applicable geometric (dis)advantage are just not enough to significantly affect a typical taildragger. Not to mention that while (both) mains are on the ground, torque has almost no effect at all (aside from the microscopic compression of the tires :)). Once you start flying something like the T-6 things change, of course, because of the large radial engine. The effect of the P-factor (pitch asymmetry) is so miniscule that aside from making pretty pictures and explanations with a prop mock up and its shadow it can be disregarded entirely. Again, things are different in helicopters (this is why a typical helicopter tends to roll appreciably on takeoff).