I guess I'm a little confused. This month's "Orchids" magazine has an article about Taiwanese orchid production and discusses several major producers. Repeated (every plant, every step) virus testing is mentioned as being a normal part of the process. There is no indication how long this has been going on, but I would assume it is not completely brand new as the article seems to indicate.
I too have heard speculation about the "unusual" Phals perhaps virused and that is what causes the patterns on them, but I would think it would be easy enough to check out. However, it still seems to remain as speculation that is unconfirmed.
Susan