AnkitMaheshwari - 7:34 am on May 3, 2012 (gmt 0)
Yes, it does count and the influence will only increase with time. AS nomis5 said Google added Social stats in Analytics. Even Google determines the Author's authority in a niche and depending upon that the link passes higher or lower weight in overall domain authority. I will suggest that you should include Google Plus along with FB towards your social media efforts of not other channels.