I love radio ads. Not because I think they are particularly effective, but because there seems to be so little oversight of what actually makes it in! Which makes for some great comedy.
Case in point. I just heard an ad for increasing your reading speed. It claims to boost your speed by a huge amount. The claim, pretty much verbatim is:
This program will increase your reading speed 1000 times! Which means, in the time it takes for most people to read 1 book, you can read 10!!
Pity the program doesn't also improve your math skills.