I'll just say this; I've experienced American, Hong Kong, and European flavors of WSLVT, and in my opinion, nowhere in the world is WSLVT more deeply rooted, complete, and at a higher level than in Europe, particularly in Germany where WSL spent a lot of time and was in fact preparing to move prior to his untimely death.
Other Germans besides PB trained with WSL in HK in the 80's and brought him to Germany. All of these guys share the same "thinking" and have clearly received the full system. PB has of course done an amazing job spreading the system around Europe. That's practically all he does, fly around Europe and teach. It is also remarkable that all of his students who have schools in his association throughout Europe are highly skilled and, while they each have their own unique set of strengths and weaknesses, there is really no deviation among them with regards to their "thinking". That's a result of understanding the complete system and having no need for the gap-filling we see elsewhere.
There are some guys on the East and West Coast of the U.S., but I think GL is the only direct student of WSL there. However, he's developed his own curriculum and style, and his Wing Chun functions differently. I suspect he did that to fit the martial arts market in the States, but I would not call what he does WSLVT anymore.