Hate to say this, but those people who are saying there isn't a grey area between Pink Floyd and Folk may not know too much about Pink Floyd's history. Grantchester Meadows (Ummagumma) has always struck me as much more folky than many of the "soft pop" performers who claim to write and sing "folk music". Just like The Beatles, early Pink Floyd was probably an important influence on manyn people on this forum and songs like "Arnold Lane" in partuclar seem to me to have become "traditional" in that they are sung quite spontaneously by a section of the population nearly 40 years after they were first recorded. What is a folk song if not what folk sing?

As for the "reverse play" silliness ... I'm incvlined to agree it's just that.

Cheers!
Ian