Oh I totally believe that. We had grass when the stadium opened in the early 60s, and then had that crappy Astroturf for probably 25 years. The end zone font never changed, so I assume they just kept it the same for that entire time frame. The only thing that changed was when Cam arrived, and they stuck that gigantic oval logo in the middle of the field.
Then when we returned to grass in 1998, it always looked horrible (the fact that they barely even painted it didn’t help either), culminating in it getting a disease and dying during the first year of the DiNardo area. They literally spray-painted the middle of the field green.