according to Google, its Buzz service already has over 9 million posts and comments. Remember, this is a service that launched on Tuesday, meaning that it’s getting over 160,000 comments and posts per hour. That’s a staggering, staggering number
Excerpt from Mashable.
Forget about the number. I think the success of Google Buzz lies within the GMail. First, you don’t need to leave your mailbox to Buzz. Second, Google Buzz went viral in Twitter, getting the attention of every person in twitterverse. Third, it’s simply another mail client, to “replace” GMail, that keeps your contact that enable you to go Buzz instantly.