According to figures from August, web users in the United States now spend more time per day on Facebook than Google’s sites (which includes YouTube). This can’t be good news for Google – but it shows the power of Facebook:

In August, people spent a total of 41.1 million minutes on Facebook, comScore said Thursday, about 9.9% of their Web-surfing minutes for the month. That just barely surpassed the 39.8 million minutes, or 9.6%, people spent on all of Google Inc.’s sites combined, including YouTube, the free Gmail e-mail program, Google news and other content sites.

U.S. Web users spent 37.7 million minutes on Yahoo Inc. sites, or 9.1% of their time, putting Yahoo third in terms of time spent browsing. In July, Facebook crept past Yahoo for the first time, according to comScore.

Facebook appears to be growing more and more popular. Google can’t figure out a way to introduce social connectivity throughout their sites – whatever happened to Google Wave?