From Google - For the last several months, a large team of Googlers has been working on a secret project: a next-generation architecture for Google's web search. It's the first step in a process that will let us push the envelope on size, indexing speed, accuracy, comprehensiveness and other dimensions. The new infrastructure sits "under the hood" of Google's search engine, which means that most users won't notice a difference in search results. But web developers and power searchers might notice a few differences
its very interesting stuff. I feel it in direct response to Bing, and the changing temporal nature of the web.
you can see features from this new demo leaking into the current search, grafted into their current tech. I had an interesting time playing with the 'results from this week' part of the search. AMAZING for finding news. It also is very savvy categorising the type of site. It can now tell if its a blog, and i suppose, eventually, if its a shop.
Its faster too. In some cases, producing results, nearly twice as fast.
I've not played with the news part yet but what you say ties in with some algo changes they were playing with last year.
I've been looking at the review part that seems to detect reviews written on page and returns them as the search description which matches what bing does in a slightly different way.