More on 10GBase USR optics

In November 2011, I posted “What Are 10 Gigabit Ultra Short Reach (USR) Optics ?” where I tried to what is the actual difference between these Ultra Short Reach (USR) optics and the certified 10Gbase-SR products. I recently received the following from an anonymous source. I’ve made some small edits to protect identity and improve the text.