Twitter experienced 1,382% year-over-year growth in February 2009, with the number of total unique visitors increasing from 475,000 in February 2008 to 7 million last month, according to Nielsen Online. This increase makes Twitter the fastest growing member community site for the month.
Zimbio and Facebook , which were the second and third-fastest growing communities, posted triple-digit growth, with the number of visitors to those sites increasing 240% and 228%, respectively.
