By the StatCounter’s Global Stats research arm,
“Twitter now makes almost 10% of social media determined global hits to websites, while Facebook still in supremacy as the key cause of traffic to global websites with almost half (48%) of ‘Social Media hits.”

Furthermore, Stat Counter says,

” Amazingly, the number two social media traffic generator is not Twitter, but Stumble upon with almost a quarter (25%). Stumble Upon was numbering one ahead of Facebook in the US last month, in terms of traffic generation.”

The records for March 2010 support 13 billion page sights transversely the global Stat Counter network of associated sites. Recently, the company made an addition of social media services to its Global Stats tool and its market share come into view to have a rise and fall way more than browser or search statistics.

As it can be seen from the graph above, Facebook pointed around in the holiday era at the last part of the year and in fact, losing share swiftly, though still leading with approximately half of social media traffic approaching from the social network. Stumble Upon and Twitter has taken pleasure in a similar growth curve since the end of last year, while the former’s growth is visibly accelerating faster than Twitter.

StumbleUpon’s great share is startling because it usually winging under the radar when the traffic generation from social services approaches to on the Web. Possibly, it is indebted its top grade to the fact that its main cause of being because having users find out third-party websites, whereas Twitter and Facebook is not only using for sharing links but also for status, location and activity updates as well as media like photos and videos. And once more, Digg didn’t add it to the top 5 in Stat Counter’s research.
Update: commenter have recommended that Stat Counter is under-counting Twitter’s share because of the overabundance of third-party customers out there. We have appealed to Stat Counter to elucidate how they evaluate referring sites.

The top Social Media sites subsequent to Facebook, Stumble Upon and Twitter is YouTube (6%), reddit (4%), Digg (2%) and MySpace (2%). LinkedIn was in the position at 12 out of 25 checking services with 0.34%, whereas Google Buzz was not yet included in the research.

[Via Techcrunch]