As i know they will rank your website looking at several factors such as quality backlinks and high quality contents!!
According to Google - http://support.google.com/webmasters/bin/answer.py?hl=en&answer=34432 Sites' positions in our search results are determined based on a number of factors designed to provide end-users with helpful, accurate search results. These factors are explained in more detail at http://www.google.com/competition/howgooglesearchworks.html. In general, webmasters can improve the rank of their sites by increasing the number of high-quality sites that link to their pages. For more information about improving your site's visibility in the Google search results, we recommend reviewing our Webmaster Guidelines. They outline core concepts for maintaining a Google-friendly website.
Yea it depends on number of factors LIKE How well your site has on page optimized and the high quality backlinks and above how unique you contents are.
you can read http://googlewebmastercentral.blogspot.com/2012/04/another-step-to-reward-high-quality.html
It depends upon the your quality meta tags like your selected keywords.How popular your keywords are in google searches and your quality content. Backlinks are also matters, how quality backlinks are coming to your site.
You may refer this help article by Google about ranking factors, http://support.google.com/webmasters/bin/answer.py?hl=en&answer=34432 Hope this helps!