I always believed that mine were real, though primitive, if that is the right way to describe it. When I truly sought the LORD and repented of much, one day I was speaking in tongues and it began to change into a much more complicated language and it has since changed several more times. Perhaps as you grow in the LORD, he upgrades you, if you will. LOL.
As far as VPW's tongue, he was from the same generation that some, not all, don't wish to offend, AOG had actually produced a phonograph record and were "teaching" people to speak in tongues. Others that I heard must have learned it from repetition of others' tongues, because for a while it seemed that everyone that I heard from this particular denom were similar. Perhaps VPW had similar training.