That's interesting. The same is said of the empty-hand work in some JMA (Daito-ryu and Ueshiba's Aikido have both had that said of them, though I know at least some of those who say so base it on a misinterpretation of "Daito"). Can you point me to some reading about this history of WC/VT development?
Gerry, you won't find that idea in any written history of Wing Chun development. That's because it is unsupported and nobody actually thinks that way but LFJ and Guy and maybe a few others that have drunk the WSLVT/PB koolaide.