I agree with you and 0x0 below. But is the number of query keywords so critical which cannot be released to the owner? I remember that it was shown to everybody when we type keywords and I think that's helpful information to users and to the site owners.

I know if the number is released, the site owners can cheat: "Create networks of fake sites to provide backlinks on popular keywords". This is really the problem of the current SEO. I have a report discussing about that: http://bit.ly/1fcOp8I