I am always hearing comments that this domain ranks better than this one, etc.. but never any facts so I registered an EMD in .COM/NET/ORG/MOBI/INFO/US for a keyword with 3600 exact month searches and $1+ CPC. I believe I can rank fairly well in google with onsite SEO alone which is why I chose this keyword. Each site has 3 500 word articles and it is the same set of articles on each site. I won't be pinging them or trying to force indexing/crawling in anyway, all 6 sites are hosted on the same IP. My goal is to see which one naturally gets the best rank. I will let this run for 2-3 months as that should give plenty of time to see where they will stand on their own. Once I have my results I will pick another EMD where I can register all extensions which I believe can be ranked purely by onsite SEO and I will once again do 3 500 word articles, however I will make the articles to each site unique aside from the targeted keyword, total word count, and keyword density and will put each site on a separate class C just to see if the results are any different. If anyone has a suggestion for my second case study on a way to do this and why then I am open to it as there could be more factors. At the end of this I will give these domains away to users on the site who I feel could use them as this is not a keyword I would target for one of my own sites. Don't ask for the domains or PM about them or you won't get one, when I gather the details I am looking for I will make a post looking for people to give them to. I will update this thread when the sites have indexed, any significant rank changes, final results, etc..