In episode 175 of Semantic Mastery's weekly Hump Day Hangouts, one participant asked how you can convey the message on Google Dance to clients without having to look like you're covering a major drop in rankings.
The exact question was:
I read Marco's article on the Google Dance and I know I have to make sure clients understand it as well. But when I say amidst a big drop in rankings, I fear I will look like I'm covering for dropping rankings. How can I convey the message to avoid that?