It has always been the case that the search terms do not necessarily appear on the resultant pages, this is actually the cornerstone of their algorithm. They use the text in the links and nearby text to apply to the site it is linking to. This was from day 1. It was why you would get good results for categorical searches like "search engine", "shopping site", "best auction site", etc. It didn't say those terms on the sites that showed up high in the list, but that's how everyone described them.
