Janet Lee Johnson | The Art of Marketing

According to Nielsen NetView, US traffic to Twitter grew 1382% between February 2008 and February 2009 — from 475,000 unique visitors to 7 million, and it’s not slowing down. (By comparison, Facebook grew “only” 228%.)

The age 25-49 demos comprise over 60 percent of visitors, and almost a quarter are 55-plus (although I have an issue with their scale - the 50-54 year olds seem to be missing…)

Average visit time low

I found this interesting, and a low consumption use as far as those I know who Tweet:

“In January, 735,000 unique visitors accessed the Twitter Web site through their mobile phones. The average unique visitor went to Twitter.com 14 times during the month and spent an average of seven minutes on the site.”