According to Web measurement firm Compete Inc., Facebook has passed search-engine giant Google to become the top source for traffic to major portals like Yahoo and MSN, and is among the leaders for other types of sites . . .
Using a snapshot of Web traffic from December, Compete’s director of online media and search, Jessica Ong, found that 15 percent of traffic to major Web portals like Yahoo, MSN and AOL came from Facebook and MySpace. The lion’s share of that traffic, 13 percent came from Facebook
What the article doesn’t discuss is how the “quality” and purchase intent of that traffic may be quite different on a search engine vs social media. But the volume is undeniable.