Looking at torque w/o rpm is senseless.
Engines that develop torque at much lower rpm than their peak horsepower peak are potent because they neccessarily develop good torque across a relatively large (rpm) band. This implies good airflow design and somewhat agressive cam timing or variable cam timing. The allowed IT prep and their pre-existing advantages will make them competetive.
Engines that develop torque at low speeds and rpm at conservative speeds, (often more torque than hp), imply airflow restricted engines. Often they are on the large end of the displacement spectrum for their #of cyls. Their response to IT tunes will depend on how much that restriction responds to IT prep. If the airflow restriction is due to conservative cam timing/lift and/or restricitve cylinder head design, then they likely won't respond as well to IT prep-and they will be toads.
V8s that have well seperated torque and hp peaks-look out! phil