I can see that. The closest I can think of is 300 Big Boys, which while I think is a great episode, has a very different pacing than most eps. (Big Boys also hews very closely to the classic A story-B story structure, which Futurama rarely uses.)
I don't see the Family Guy comparison at all though. Family Guy's humor, to me, is about a few core tenets, including random flashback / asides and beating jokes into the ground. This had none of that. The entire episode followed Amy and Nibbler, the only cutaway was a single contextualised flashback. The only thing that made me think of Family Guy was the cat's voice, which, combined with his cute/evil personality was very reminiscent of Stewie.
Also, I'll admit, I liked the LOLcat poster.
"MEOW MEOW MEOW MEOW"