Complete details at their site...
http://www.google.org/recharge
http://www.google.org/recharge/experiment
A few charts:
+For+All+Trips&chf=c,lg,315,ffcc36,0,fffab2,0.75|bg,s,ffffff)
Electricity usage for plug-in vehicles: Ford Escape Plug-In 133.2 Wh/mi, Toyota Prius Plug-in 139.6 Wh/mi
+For+City+Trips&chf=c,lg,315,ffcc36,0,fffab2,0.75|bg,s,ffffff)
Electricity usage for plug-in vehicles: Ford Escape Plug-In 133.2 Wh/mi, Toyota Prius Plug-in 139.6 Wh/mi
+For+Mixed+(Combined+City/Highway)+Trips&chf=c,lg,315,ffcc36,0,fffab2,0.75|bg,s,ffffff)
Electricity usage for plug-in vehicles: Ford Escape Plug-In 133.2 Wh/mi, Toyota Prius Plug-in 139.6 Wh/mi
+For+Highway+Trips&chf=c,lg,315,ffcc36,0,fffab2,0.75|bg,s,ffffff)
Electricity usage for plug-in vehicles: Ford Escape Plug-In 133.2 Wh/mi, Toyota Prius Plug-in 139.6 Wh/mi