>> Adopting semantic search technology would require the big guys, in essence, to start from the beginning—rescanning every Web page according to the technology's fundamentally different method of analyzing and classifying Web pages.
They make it sounds as if Google indexed the internet once and hasn't done anything since. Don't they "rescan" the interwebs every day?
There was one post on HN that was testing the crawl time of the Google spider, it was 10 or 20 minutes, I believe?