And “that’s all folks” – nowadays it’s just a kind of “image effect”, when it comes to checking creative concepts with focus groups.
It’s good to let the good ideas live and not “focus grouped” them to death.
Here is a video, illustrating how focus groups could kill a really remarkable commercial, if the client trusted them and not the agency’s creative team. This is a real video with focus groups and no actors were used.
And here is the “1984” Apple Macintosh Commercial.