2009 was a shocker of a year for MySpace in terms of traffic stats - Facebook left it for dust online, and most research indicated that it was also being trumped on mobile.

However, new mobile measurement firm Ground Truth begs to differ. It's released a chart of the top ten US mobile websites in the first week of 2010, ranked by total page views.

Top of the chart? MySpace, followed by Facebook, Google, Mocospace, FunForMobile, AirG, Yahoo, Cellufun, Mbuzzy and Myxer. This doesn't include pages served by operator portals, though.

Ground Truth claims its service is much more accurate than its rivals, using census-based data taken directly from mobile operators and other providers.

"Ground Truth was founded to fill two critical gaps in mobile measurement: accuracy and completeness," says CTO Michael Libes.

"The only data source that can provide precise measures of mobile media usage is the mobile network itself."

Buongiorno USA and AdMob have already praised the company's methodology, with AdMob's Jason Spero saying that its data "will help marketers optimize their spend and justify a mobile strategy".

The company has launched with VC backing from Steamboat Ventures and Voyager Capital.