Experian, has released a new report that shows that active users are spending more time on Twitter than ever before. However, the number of overall visits to has decreased. This basically means that each user spends more time on Twitter per visit, instead of visiting it more often but for a shorter duration of time.

According to Experian, the number of US adults visiting Twitter at least once a month have gone down by 14 percent in November 2010, compared with November 2009. 8.25 million adults visited Twitter.com at least once during a month, down from 9.54 million adults who visited the site once a month back in November 2009.

Although troubling as it may look, these statistics dont show the complete picture, as it is still possible that this decrease in visitors may be a result of more people using Twitter via Twitter clients. Dick Costello, CEO of Twitter, eluded to this fact when he revealed earlier this month that 40% of all tweets on Twitter come from a mobile device, up from 25% a year ago.

The report states that Twitter.com visits have increased by 37 percent in November 2010, compared with November 2009. Twitter.com visits reached an average of 10.0 visits per month in November 2010, up from 7.3 visits per in the same month last year. The increase in time-spent on the site per visit might have a direct correlation with Twitter’s release of its new home page, that was rolled out in September 2010.

In all, US users spent 2 hours and 12 minutes on Twitter.com each month in November 2010, which translates to an increase of 19% from November 2009.