A small little analysis I did of the top ranking sites for our core keywords revealed that nowadays Google rarely favours straight corporate sites. Articles, trade sites and directories are among the kinds of sites that breeze around the higher echelons of Google and the other search properties. You can add to that list participatory (user content generated) sites such as Wikipedia – which appeared just about everywhere.
The mighty G pumps the oxygen into these sites that keeps them ticking. According to Bill Tancer from Hitwise:
"Wikipedia is the second most visited site from Google searches (MySpace.com is number one), due mostly to the sheer volume and prominent placement of Wikipedia listings in Google search-engine results. Google is responsible for 46% of Wikipedia’s traffic."