Yeah, ZIZ is right, both shows are very American in nature. I usually joke about how shallow we are in that the rest of the world can import our television and movies and enjoy them just fine, but we have to remake anything we decide to import (The Office, Life on Mars, long ago there was even a pilot for a US Red Dwarf that thankfully crashed and burned). But I guess when it comes to something like Family Guy (which I don't like) and Robot Chicken (which I love), we have finally found something culturally ours. Hopefully we continue to develop along this path and come up with better stuff in the future.
As for Family Guy not being as good after it was revived, I was never really into it before or after, but I feel that way about Futurama. I was very disappointed when it was canceled, and I was extremely excited when years later I heard it would be revived. Watched the first two new "movies", and found myself not the least bit interested in ever seeing another new episode of Futurama again. Still love the original season though.