This sounds kind of scary, even though it´s really not. SEO Chat published an article today that needs to be read.
You might have heard it before, due to the fact that the same words have been all over the Internet a while ago. It really matters how people come to your site (from a search engine, from an article or from an ad). The words are crystal clear: “it is much better to get good press than it is to simply buy advertising”.