Creep or stretch wasn't the term I should have used.
Limb Saver String Leaches have a thickness to them of a few millimeters I imagine, when the string hits home and the arrow is released from the nock, don't you think that rubber is compressed. I actually think that is how they silence to some degree? The same phenomenon occurs possibly when leather strips from beaver/otter balls are tucked between the string, or any other material, that creates less string tension, slight as it may be. The string, in affect, is not as taught as it would be with nothing between the bundles.
Anyone who makes strings, me included, tries not to have too many twists in their strings to decrease the springiness or forgiveness in that string, once shot in. This is my only point. Whether this affects performance by any measurable degree...I doubt it as well.
I am beginning to think though, that material between the bundles may have a greater silencing affect, in part, for the reasons described above.
Kris