Is Google Still The Search Engine Leader?

While reading a story on eweek.com, I just got confused. It stated and in fact claimed that Google is still the search leader. The confusing point was nothing but a post by SEO Disco, where by he has shown some very interesting facts about Google. Just attempting to have a proof of his reports I searched for 'search engine' in Google, and Google itself was no where on top pages. For a proof I'm attaching an image, have a look at it!





The only thing to ponder on is, whether Google will be SEOing it's home page or not, and or should Google do so?