I can't stand their music. Pop folk does nothing for me It gives me the creeps. Then again I hate light poppy stuff. (Sorry JK) You're forgiving of course with Genesis and 10cc.
The Seekers were also extremely popular in the States also. Even the record shop I recently go to had a load of their stuff in think they were first pressings or first issues. They flew off the racks in a few days even the 45's.
A friend of a friend of a friend of a friend.

(He might of been an acquaintance for a gig if memory serves me correctly) He lived near Peter Yarrow from Peter, Paul and Mary said he was always and his conviction shocked nobody from the area,. He stated he always looked creepy looking and odd and their music matched his personality 'awful'. Yet they sold millions of records I don't care if Puff The Magic Dragon is fairy-tale or a drug song it's just shit.