from eMarketer.com / May ‘09:
Call it the Oprah Effect. Or maybe it was all the publicity generated by the Ashton Kutcher/Ted Turner race to reach a million followers. Whatever the cause, there is a growing fear that the mammoth microblogging site may be overexposed, overhyped and underused.
It is true that Twitter’s growth is skyrocketing. No one argues that. eMarketer estimates there will be over 12 million Twitter users in the US in 2009, slightly more than twice last year’s number.


But figures released by Nielsen Online suggest that Twitter’s retention rate is only 40%. In other words, as David Martin wrote on the Nielsen blog, “Currently, more than 60% of US Twitter users fail to return the following month.” Not so good.
(more…)