According to Nielsen, the buzz for the new Call of Duty game jumped from 4,911 messages on April 30, to 21,454 messages on May 2 after the official announcement. Interestingly, the Xbox 360 only had a slight lead in the conversations over the PS3 version.

“Historically, buzz has been at its highest around launch time for Call of Duty, generating up to 69,942 messages on a single day,” said NM Incite analyst Mickey Campione. “As far as pre-launch buzz goes, today’s buzz total of 21,454 is second highest, only to 5/31/2011’s 21,728 messages. The buzz on 5/31/2011 came after Activision announced their Call of Duty: Elite online community.”

Source: GamesIndustry.biz