Thank you both for your explanation. I think I know what springs are now, at least. However, I am no closer to understanding what I need to change to achieve the speed that both Philemo and Gérald say I should be seeing. Now I'm seeing these strange textures on the skin and clothes that were not there when I first tried VWD. I have tried re-downloading the demo but it did not change anything.Some cloth is quicker than others but none are what I would consider quick. I can see the stepping through and I'm seeing a step change about every 3 seconds with a "quick" cloth and about 10 seconds with a slow cloth. I don't know if that relates directly to FPS though.

I have not had a chance to try a new test in the past couple of days but I hope to do some more tests in the next few days. I'll post my findings and, no doubt, ask more questions.