Google ranking is not mainly based on your back links although that is v. important but equally important is your content. Google love good content (with your keywords) and for your information google ranks pages and not the whole website so maybe you should also look at it from that perspective. you may also want to write good article and summit it at any ofthe article directories eg Ezinearticle and fly in their wings (when the article directory in ranked based on your article there you are at the fore front. I hope this will help a little
Google only knows for update of pageranks. As i know Google has its algorithms for page ranks and quality of links matters not the quantity of links.
That is one of Google's best kept secrets, but the age of the links and the quality of its backlinks play a part