“Cloth->Expert->Sub Sampling
Highly dependent upon cloth parameters”
It is dependent on the actual mesh. With cloth collision Tri-poly and N-gons are extremely difficult to perdict movement. Its also important to keep the polygons similar in size or the collision tend to flicker.
The EPS size is going to a large factor and its a good idea to play with it. A good placeto start is by measureing the distance between the points of the smallest polygon.
The tutorial on CMIVFX (not free) is really good and explains all the options very well.
The help in the manual is really good too.
/Randy