The goal of this experiment was to show that a good social media strategy can lead to more visibility in organic SERPs. We took a sampling of SERP data from 2560 high value keywords. The list includes short tail, long tail, branded, non-branded, misspellings, and even a few URL searches. This data was acquired through our Partner API.
As you can see below, Facebook appears in the top 50 results for nearly 25% of these terms and a little over 5% have a Twitter URL in the top 50. Many of the ranked Facebook pages are tied to brands but there is also a fair number of pages and notes which are ranking well for more generic terms such as [cheapest homeowner loans].
If you would like to run your own experiments against this set of data, you can download a copy of the SERP and keyword data. Each SERP is in json format and includes approximately 120 results for each keyword.