Nielsen: Twitter's Growing Really, Really, Really, Really Fast

A small new survey from Nielsen about the five fastest growing “member community destinations” in the U.S. reveals what we all kind of knew already: Twitter is at the top. From February 2008 to February 2009, it clocked in at a whopping 1,382 percent growth rate. That’s to be expected, considering the amount of press the still-without-a-business-model microblogging service has gotten in recent months.

In third place is Facebook, with 228 percent growth year-over-year according to Nielsen. That’s not terribly surprising, as Facebook is still growing in the U.S. but not quite as exponentially as it once was.

There are, beyond that, a handful of interesting things to note. Two of Nielsen’s top five, for example, aren’t social networks but rather wiki creation services: Zimbio (240 percent growth) and Wikia (172 percent growth). And in fourth place is Multiply, which probably got a surge of activity when it recently acquired the MSN Groups service that Microsoft (MSFT) was spinning off.

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