Simple math, really.
The Simpsons minus the genius-ness that the Simpsons series has equals an overrated TV show for people who find irrelevant and random clips humorous (aka Family Guy).
Some people may think that South Park was being "random" with the manatees on the Cartoon Wars episode, but unlike Family Guy, this idea was a great use of metaphor of how it seems as if the writing staff of Family Guy just take random ideas ("idea balls") and put them together to form a "Remember the time when..." joke.
The only way I`ll ever credit Family Guy as "genius" is if the whole reason of creating Family Guy were to make easy money by targeting the not-as-mentally-or-emotionally-intelligent group of America (which appears to be a lot) with cheap jokes.
Family Guy Staff: Let`s take 5 idea balls and write another one of our classic jokes!
"Laundry" + "Date" + "Winning" + "Mexico" + "Gary Coleman" = Lois asks Peter to do the laundry, and Peter recalls winning a date in Mexico with Gary Coleman.
"Remember the time when I won a date in Mexico with Gary Coleman?"