I use very light torque as well - it's more like imagining that you're honing the edge and not the spine than consciously twisting the blade in your fingers. I also use quite a lot of pressure variation from slight added weight to less than the weight of the blade - depending on the stone, where I'm at in terms of strokes on the stone and how the edge feels. You can quickly trash an edge on a Shapton 16K or 30K with too much pressure/strokes/torque. I've recently been doing a lot of work with my new Zulu Grey as a finisher and quite like it - it's very slow but very forgiving and the final edges are some of the best I've shaved with.

-john