Not so fast, there David. I specifically recall WHBQ in Memphis doing "oldie but goodie" weekends, so not everyone was afraid of the term. I seem to recall that they also referred to many of them as "songs you grew up with" or something like that.
The context of the beginning of this food-fight was someone saying that in 1961, 1962 or 1963.... that songs that went to the top of the chart in 1956, 1957 and 1958 we Oldies, Golden Oldes, or The music you grew up with.
Most of us in radio back then were not yet aware of listener demographics as we know them today. Even when we were working a rock station we assumed we had adult listeners... including the owners of retail businesses that would be buying our advertising.
Yes, the "smart people" in some markets (the Storz folks, the McLendon Folks, and a little later the Bill Drake phenomenon would figure all of that out.)
In 1956 to even 1963 an awful lot of radio was still into Block Programming. At stations where I worked, the owner might quit selling long enough to come work a couple of hours on the air when some one needed to be off, and then we would hear chatter about Old Favorites and "Evergreens" and "music from when you were growing up." And we would get Jimmy Dorsey or maybe Glenn Miller or The Andrews Sisters.
In that era what you got in Lubbock TX was different than what you got in steel mill cities like Pittsburgh and different that what you got in Philadelphia. For part of that time period I was based between Memphis and Little Rock. Those two cities could be like two different worlds when it came to radio.
Everybody is getting their undies much to bunched up because they grew up in places like Great Bend KS and Roanoke, VA and Macon GA and they have very accurate memories of radio worked!!!! (where they were!)