Originally Posted by Aeroplane
You missed the point. Your assertation was that the varying forces on the chain due to the eccentric ring would stretch the chain faster. The Sheldon article points out that chain wear occurrs because of running a dirty chain, not the amount of force on it.
Sorry to disagree but it is a combination of both. The dirty and less cared for chain obviously will ruin faster, but to believe that the forces acting on a chain doesn't cause the pins pulling against the plates to actually "bite" into them resulting in the chain appearing stretched is silly.