Ive tested 2 my websites too see what kind of optimization works better. First domain: I use domain with perfect onpage optimization, no blackhat tools, only few natural links and around 20 submitted directories by day. NO WEB2, NO BOOKMARKS, NO SOCIAL NETWORKS, NO BLOG POSTS, NO FORUM PROLES ETC, NO EDU, GOV LINKS, NO RSS FEEDS ... Just a couple articles and manualy directory submission. Second domain: Ive use same onpage optimization as above but with support of best blackhat tools: senuke,serobot, xrumer, AMR, scrapebox, magic submitter (all licensed) ... with 10x more do follow links then webpage above. What is result in Google today after 2 months trying both of them: Winner is first page (with no use of any blackhat tools) its a 3rd in Google. The other page with all best SEO tools support is on the 3rd list or 26 position. Ive test this because i never belive in sucess of link spamming and as i see now it doesnt and it never works. I work in SEO for a years and this make me sure that old methods of white link building is much more sucesfful then spam. Google dont care about quantity but quality. First page have 10x less dofollow backlinks, second one have many more backlinks from high PR sites, but still owned but first.