It appears Twitter is finally had enough of third-party analytics companies getting all of the publicity over tweet counts–so it’s spilling the official beans.

Folks were tweeting 5,000 times a day in 2007. By 2008, that number was 300,000, and by 2009 it had grown to 2.5 million per day. Tweets grew 1,400% last year to 35 million per day. Today, we are seeing 50 million tweets per day—that’s an average of 600 tweets per second.

I may have to admit to contributing maybe half that number on some days.

People may be more honest on Facebook these days, but we still don’t trust them. MediaPost reports that an ARAnet study shows social media and search engine recommendations coming out tied among the general population—but search engine recommendations leap out in front among affluent (>$75,000/yr—49%) and younger adults (25-34—50% vs. 31% for social media).

However, the general consensus was that personal advice from friends or family members was tops, with 59% rating it as important in influencing their buying decisions. But to me, that sounds like a completely different dynamic—are we supposed to be measuring the influence of people we know vs. strangers vs. corporate messages, or are we measuring what medium is more influential? If your mom delivers her advice via your Facebook wall, are you less likely to take it than if she told you in a phone call? Is it surprising that most people trust people they know, who know them and their preferences, than random strangers on search engines or social networks?