From my recent research, i found that a lot of big site can ranking top with a lot of their articles, even if the keyword display once on their article page. I think this is google trustrank effect them, not only pagerank can explain it. Because have some site which PR4 only still ranking very well. I guess google will instead Pagerank with google TrustRank in the future, because Pagerank can be easily build with some high pr pages, but the trustrank is very difficult to get. I know the trustrank related with site's back link and domain age. I'm sure it have a lot of factors, do you have any opinions about google trustrank factors? let's share it if you get some ideas about it.
Yup. still not going in to the discussion of Trust rank Vs. Page Rank... Having own unique and quality article published on your own website (not in article dirs) will bring you on top that's for sure.
But i found that even if i published quality contents, it still be buried. I guess google using trust rank to instead page rank will.