http://www.pcmag.com/article2/0,2817,2400052,00.asp
On Jan. 18, one day before Megaupload was taken offline for massive copyright infringement, it had 34.1 percent of all file-sharing traffic, followed by FileSonic at 19.1 percent. Putlocker, RapidShare, and Vidoezer all had about 4 percent.
After Megaupload went down, Internet traffic dropped by an "astounding" 2-3 percent, DeepField said. But that didn't last very long. By the end of the day on Jan. 19, there was simply "a significant re-allocation of Internet file sharing traffic." Putlocker had 27.5 percent of file sharing on Jan. 19, followed by "Other" at 17.1 percent and NovaMov at 14.6 percent, DeepField found.