Try this neat Search Engine Experiment.
It’s basically a un-branded search which represents Google, MSN and Yahoo search engines. Using a keyword of your choice, you do a search for Brand X, Y, & Z.
You then select which of the search results is the most relevant and it will tell you which search engine it is. Try it for a couple of keywords to see which of the 3 SEs is most relevant for you.
Now, which is the better search?
That article is so interesting and makes a very nice image in my mind. That is very much helpful in nominating the board of directors.