http://www.freerepublic.com/focus/news/2646969/posts?page=25#25
http://newsbusters.org/blogs/p-j-gladnick/2009/01/14/comcast-broadcast-all-obama-channel
I would answer your question with a yes.
More.
http://www.midcoast.com/~lizmcl/advt.html
From Hawthorne to Hard-Sell
Radio Advertising and How It Got That Way