Read this, it's about thumb preview TGP's vs text TGP's. After you read it, swap out thumb preview TGP's and put in TGP's in general. Then swap out text TGP's and put in blogs. Compare a one-page site, with tons of outgoing (scripted) links, to a multi-page site, with lots of keyword-rich text, having moderate amounts of outgoing links. Common sense is your friend.