Good article, thanks. When it comes to content, however, I think it's a big deal of SEO and mainly for two reasons; internal linking & long tail. With a good internal linking you'll be able to spread the link power to your different pages which will have a great impact on your SEO if you do it correct. Also, if you have some power in your domain and create a lot of content, there will be a hell lot of long tail KW's to rank for and your traffic will definitly increase. The long tail KW's are much easier to rank for and a lot of content will gain you a lot of traffic. Great article, anyhow!