A religion typically consists of a being (or a collection of beings) that exists.
Google isn't exactly a being, but it does exist. Some people even consider it a godlike entity.
For a typical god, you provide a ritual or some kind of prayer. This prayer typically takes a long time, and may not be answered.
For Google, you insert your prayer in the search form and click search (or conveniently click enter) and your prayer is answered within seconds.
A typical god provides a blessing to an individual. That blessing depends on the mood of the god.
For Google, the blessing is straightforward. Need an image? Search images. Need a calculation done? Insert some numbers and a few code words (like mul I believe). Conversions are also done.
A typical god will have a place of prayer carved from the most devout believers to enable individuals with the same faith to pray to that god.
www.google.com is the temple of Google.
A typical god has a natural born enemy (such as Jehova and his brother lucifer, or Zeus and Hades, etc).
Yahoo! is the devil, and let me explain why.
Yahoo, sadly, is the default site an individual is directed to when they accidentally click on an email link.
Yahoo's chatrooms are crappy, buggy and full of 1337speakers who think they are the gods of the universe (which may be true if universe means nothing).
Yahoo's search engine is slower, and has a tendancy to use similar indexes on future pages.
The word Yahoo implies that you will have an enjoyable experience when you use it. This is a sign of deceit, of which many devils in history are known for.
Yahoo doesn't just want you to search for information you need - it want's to distract you with enticing personals, news that nobody cares about, and occasionally photos of women that think they're pretty but really aren't!
Google is much more straightforward. It provides a very simple interface for users to do exactly what they came for - get information they need.
Google is the solution. Google is the future.