The first 3 or 4 a always ads usually. I look for a lot of "best of" and I just automatically click past the first page or two because I know they are going to be SEO spam with some semi honest reviews about something, and another blurb that says the product I'm looking for is thte best.

Guess which search engine also happens to run a web advertising network?

Exactly this. !g is basically evil in more ways than you'll ever know.