All very interesting points.

I liked the article because it seemed to address a refinement of the skills needed to torque roll in general.

Like you are all pointing out, different designs, sizes and configurations will undoubtedly be "easier" to keep in a TR.

The article seemed to imply that if you're "chasing your tail" around the sky, you are not doing it correctly. I agree in part, but I think the author may have somewhat disregarded what is perhaps the biggest difficulty in getting to a point where you can even start to torque roll, and this is learning to use the rudder and elevator instantly from any airplane attitude (near vertical, in this case). I propose this is the central problem, rather than trying to simply minimize the amount of controlling needed in or around a sweet spot. I think everyone realizes this, but it wasn't overtly stated in the article.

If you can't correct the plane as it falls out of the sweet spot (thereby "chasing" it) , then you really shouldn't have been there in the first place (ie, it was a lucky move).