It’s quite interesting that while Google gives in depth information about many other websites around the world with Google Ad Planner yet it gives no information on its own site. That’s not exactly the case below as we can see Quantcast gives full data on Google.com:

Why doesn’t Google want you to know about their data? Is it because their traffic is flat and has been flat for the last 6 months?:

As you can see below in depth demographics data IS available, just not from Google:

Some quick demographics from Google:

• 67% of users are between 18-49 and is above the Internet average.
• 78% are Caucasian but this is below the Internet average.
• 15% are Asian, Hispanic and Other. This may seem small but their usage of Google is higher than normal.
• 58% make $60K+, so Google’s usage amongst monetary classes is split pretty evenly.
• 58% have attended College and Grad School. What’s interesting here is that as education goes up the concentration of users in the more educated groups goes up as well.

Whatever Google’s reasoning is, the fact of the matter is that their data is out there yet they don’t want you to have it via their tools.