Matt is a master public speaker and is extremely sincere in his explanation. I have met him and he is a very personable and friendly guy in real life, and listening to him speak you can feel his passion for his work and devotion to Google.
Google could not ask for a better spokesperson, it is rare to have someone with high technical ability and good public skills.
Listen to how Matt explains how Google thinks long term and wants users to have the best experience possible by finding answers to their questions quickly. He publicly supports search engine optimization when it helps searchers find quality information quickly.