Absolutely true. It wasn't until The View (gag) came along that they fully cleared the 11-noon slot. Game shows, off-net reruns, Edge Of Night...they all were bumped.
To further clarify: WPVI ran the 11am-12pm hour in pattern until June 1980. At that point, the 11am-12pm hour consisted of reruns of "Laverne and Shirley" and following that, "Family Feud". WPVI ran both of those in pattern. When the hour was replaced with reruns of "Love Boat", and "Family Feud" was moved to noon, WPVI began running "Match Game" in the 11am timeslot and kept "Family Feud" at 11:30. Feud stayed at 11:30 for three years until "Loving" premiered in June 1983. They then ran "Loving" in pattern and "Family Feud" ran on WTAF-29 (at noon) for the rest of the summer.
Those "Love Boat" (and for the summer in 1981, back-to-back "Three's Company" reruns) found a home in Philadelphia (as did "Edge of Night", too) - WKBS-48. They ran the aforementioned shows and also reruns of "Too Close for Comfort" until the station went dark in September.
After that, WTAF-29 would usually run ABC's sitcom rerun(s) since WPVI still wasn't picking them up, on a one-day delay.