From Business Insider's Silicon Alley Insider, by Jay Yarow & Kamelia Angelova:
" Facebook is barreling down on its rivals, threatening to become U.S. web users' home on the web.
Time spent on Facebook soared to 27.6 billion minutes in December, up from 17.8 billion minutes in October, according to data from comScore. (In December 2008, it was just 9.3 billion minutes.)
Google, where users spent 36 billion minutes in December, managed consistent slow growth in the second half of the year. Meanwhile, online rivals like Yahoo, Microsoft, and MySpace are all down.
It's especially ugly for Yahoo.
* Yahoo, which fancies itself as your home on the Internet, has seen time spent on the site slowly decline, despite its big ad campaign.
* Its uniques are flat, while Facebook's are growing.
* And, it's not shown in this chart, but comScore says Facebook had more pages viewed in December than Yahoo for the first time ever — 44.9 billion for Facebook versus 38.8 billion for Yahoo.
Carol Bartz knows Facebook is coming. On Yahoo's earnings call she said, "we are actually happy with the engagement we are seeing with us. We just can’t keep up with that [Facebook's] kind of engagement." "