I am old enough to remember them. There were certainly two schools of thought with them. The 1976 Stanley Cup was almost about the bruising style of the Flyers vs. the skill of the Canadiens.
I am not passing judgement at all, but I do recall there were a lot of hockey fans who were cheering for the Canadiens who normally would not cheer for them. Dick Irvin tells that story quite well.
here is a card from my collection as a kid, as I collected those years.
1968 Parent Front.jpg