Over 40 percent of Twitter updates are "pointless babble" says a new report that studied 2,000 tweets over a period of two weeks.

Twitter recently redesigned its homepage - shifting from "What are you doing now?" to "Share and discover what's happening right now, anywhere in the world, indicating an attempt to become a real?time news source.

Pear Analytics captured 200 English-language US tweets each half-hour from 11am - 5pm CST (6am -12pm GMT) daily.

It then categorized tweets into six different types: news, spam, self-promotion, pointless babble, conversation, and pass-along value.

Twitter babble

Mashable reports that the winner was "pointless babble" tweets - with 40.55 percent fitting into the "I'm eating a sandwich now" category.

Conversational tweets came in a close second with 37.55%. Pass-along value - retweets or RTs - were in third-place with only 8.7 percent. Spam accounted for just 3.75 percent of all tweets studied.

Other key results of the study included:

  • News tweets are heaviest at 2:00pm CST (9pm GMT) on Tuesdays
  • Pass-along value tweets are most frequently seen at 11:30am CST (7.30am GMT) on Mondays
  • Spam tweets flow consistently all day, everyday
  • Conversational tweets are heaviest on Tuesdays

Pear will be conducting this same study every quarter to identify other trends in usage.

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According to Quantcast.com these are Twitter's demographics as of June 2009:

  • Twitter reaches 27 million people per month in the US
  • 55% are female
  • 43% are between 18 and 34
  • 78% Caucasian, but African American users are 35% above Internet
  • average
  • Average household income is between $30 and $60k
  • 1% of the addicts contribute 35% of the visits
  • 72% are passers?by, while only 27% are regular users