Twitter is 5 years old today, sparking rounds of nostalgia and statistics. According to TheNextWeb, Twitter saw more than 600,000 new users in yesterday alone. When Twitter first started, it took more than 16 months to reach the 600,000 user mark. Meanwhile, the weeks-old Google+ demonstrates the other side of the spectrum of social network growth: in just a few weeks, it has gained more than 10 million users. Larry Page announced this stat yesterday from his own Google+ account.

PR distribution company Marketwire has bought out Sysomos. Sysomos is a PR company that focuses on social media analytics. The terms of the deal was undisclosed. Sysomos is a Toronto, Ontario based company that received funding from GrowthWorks and the Ontario Centres of Excellence. [paidContent]