En su artículo Why We Desperatley Need a New (and Better) Google nos expone:
"Google has become a jungle: a tropical paradise for spammers and marketers. Almost every search takes you to websites that want you to click on links that make them money, or to sponsored sites that make Google money. There’s no way to do a meaningful chronological search.
We ended up using instead a web-search tool called Blekko. It’s a new technology and is far from perfect; but it is innovative and fills the vacuum of competition with Google (and Bing)."
El artículo es extenso e interesante con buenos link de sitios y propuestas.