According to new research by sharing platform Shareaholic, search engines like Google, Yahoo, and Bing are driving a dwindling share of total site traffic across the Internet. Over the last six months, all top five search engines in the US drove a smaller share of overall traffic to sites that Shareaholic tracks. Conversely, there has been a spike in social referrals, suggesting that social traffic is far more valuable to websites looking to generate traffic than search engines, at the current juncture.