Clay Shirky, a reporter for Fortune says, "So these aren't terrible numbers, but it's certainly a much more modest success than we've been led to believe by the business stories saying 'there are millions of people using Second Life and it's growing by leaps and bounds.'"
Linden Labs refused to comment on the Marketplace piece, which is par for the course at this point. Expect more stories like this in the near future because it's been a long time coming. Although it is good to see Linden Labs beginning to release some actual data to help diminish the backlash.
See also: Second Life millionaire pummeled with penises