i spoke with one of the master chefs that teach here to tyr and get some answeres. His thought was that "classical" means roux, and that the reference was an acurate prediction of reductions and less fatty sauces, not a new way to work traditional sauce. SO I guess that one is still up to inerpretation, but i wouldnt call an arrowroot and stock mixture a veloute.
As to the roux made with butter and a pure starch I've yet to find an answer, time to go shopping