From Creative Capital…

I just got a hold of the ComScore numbers for U.S. social networking sites, and it ain’t pretty folks. (See an abridged version of the chart below this post.) After peaking in October of 2007 with 71.9 million users, MySpace, the leading social network, has seen its audience fall back to around 68.9 million unique visitors. December saw no growth over November, though visitors were up 13% from last December.

More alarming are the engagement metrics. Since December 2006, when MySpace engagement peaked at about 234 minutes spent per visitor, time spent on the site has dropped consistently throughout the year. In December, time spent per visitor saw its biggest month-to-month drop, of about 8.5%, to 179 minutes per visitor per month, down from 196 minutes in November. That equates to a 24% year-over-year drop.

But the pain is not just a MySpace problem. It seems to be an industry-wide issue. The total audience of U.S. social networks seems to be stuck at a low-to-mid-single digit growth rate, while the engagment metrics are falling for just about everyone. Time spent on Bebo.com has been sliced in half over the last four months, while Friendster’s time spent has plummeted nearly 75% in the same time period. Overall, minutes spent per site fell 5% in December 2007 compared to the year-ago period….

More in that vein here.