Blender 2.45: Rigidity vs. E.Stiff

I was wondering what were the best softbody physics settings for making a bouncing ball in Blender 2.45. I was very surprised that there was a sweet spot in the middle here. I am wondering if the use of an icosphere--which has triangles-- made for a very different experience. I may do this again with an object made with quads. Sorry if this is boringly slow-- I'll fix that in another version, too.