I found this in a few different places around the 'net - hopefully it's helpful:
Quick Search Tips
- Using capitalization can result in better performance when using Search Companion. For instance, Mary Smith may produce better results than mary smith.
- If you didn't find what you wanted on the first search engine, choose Automatically send your search to other search engines to submit your search to other engines that are appropriate for your query.
- If you like having an animated character, but want to use a different one, choose Change Preferences, then With a different character to choose the helper you like.