CV6MTX,
I have no doubt that you are knowledgable, my only problem is the blanket statement that twin turbos is never better than a single. Both setups have thier merits and the particular application, its intended use, and the hardware available should be considered, without blindly choosing one setup or the other.
fwiw, there are at least several present and past Ford engineers here, including at least one from SVT Engineering (formerly SVE) as well as several more from Ford's suppliers.