Matt Cutts Seminar in Korea (Seoul) is available in a video and is a must watch to understand the evolution of Google and search engine algorithm. It is a 45 minutes video where he answers all the queries related to search engine. A must watch for all webmasters.
Have a look at the video as it will clarify a lot of apprehensions about Google search engine indexing. This was his first presentation which was simultaneously translated into Korean Language. This is the reason that he is speaking so slowly during the presentation.