Twitter users abandon website after one month

More than 60% of Twitter users stop using the social networking site one month after signing up for the service, says new research from Nielsen online.In no small part to celebrity exposure and media coverage, use of Twitter continues to skyrocket, growing more than 100% since March, but new research shows the microblogging website is having trouble convincing users to stick around.Data from Nielsen Online found that Twitter has a "retention rate" of about 40%, meaning four in 10 users will continue to use the site from one month to the next.