With no advertisement for new episodes at all in 2010 and 2011, Catch 21 kept getting pushed back to different time slots, and still beat out ratings for Improv, Love Triangle, and even Baggage. Catch 21 originally aired at 5:30pm at the beginning of its 4th season, then 4:30pm (with Power of 10 entering the 5pm hour), and then was placed at 5pm in the Spring of 2011.
In all those time slots, Catch 21 always got ratings above 300K, and half of the time near and above 400,000.
Family Feud won't die anything soon. GSN has more than 1100 episodes leased between Karn and O'Hurley, and an additional 315 for Harvey right now. There are plenty of cycles of Family Feud that can air on the schedule a couple times, and would still have no rerun abuse. By the end of 2012, Karn and O'Hurley will get cut down from their 25-ish slots a week now to the teens, but will still prove will in ratings' ranks.