I agree. In my own research, Google has this rather annoying habit of returning pages that are years out of date. I guess that's not so surprising given that PageRank ranks pages based on the number and rank of referring links. Higher ranked pages have more importance than lower ranked paged. The more high ranking pages pointing to a page, the higher the page's rank. All of which tends to favor older pages.
To see how effective Hakia could be for enterprise researchers, I ran a search based on the nebulous request "what is the number of mobile workers in the enterprise?" The results were impressive. Google's first reference pointed me to an article about mobile ajax workers. Haiku referenced a report on mobile workers. You can see both search results below.