Google Analytics - time on site for tabbed browsers?

[Umbertide]

Hi, could you help?

A client of mine has asked about if a user visits a site, opens another tab then leaves both open all night, would this skew the time on site stat in GA?

Or another scenario - a user has 10 / multiple tabs open would GA track the user even if the tracked site was not the 'live' tab?

thanks in advance

[IanTurner]

Yes it would skew the time on site, and I do it constantly usually with about 30 tabs.

As far as I know Google Analytics is not clever enough to monitor which is the live tab.