Mark:
Wasn't around 70 years ago to really know.
What I can say is that my home courses I saw the trend as follows:
In 1978 Aronimink hired a new Green Super and he liked to soak the course like I have never seen. He was very worried about burnout and losing his nice green look. Tee shots hit with Drivers or almost any club plugged and backed up in the Fairway. On Certain holes it seemed we were always standing in casual water.
The super at Aronimink today has created a much more balanced approach. The course looks terrific and where he has water it (which is most everywhere except certain areas of the rough) has what I term Green and Firm conditions. You can play a myriad of shots. But I also doubt it is the type of condition Flynn referred to.
At Charles River when I joined in the mid 70's the fairways and greens were hard and fast.
After the watering system came in they were still pretty hard and fast and stayed that way until just a couple of years ago.
Now the super is planting rye grasses and actually overpowering the POA to a large extent but he is so fearful of burnout that we now have very soft conditions all over.
Could it be that the training of the more modern day superintendents is to want things green and lush.
Don't know but I think I could be seeing a trend here.
Maybe Flynn was giving us all a warning 70 years ago "Not to Fool with Mother Nature"
Fairways and Greens,
Dave