YES
there are a total of 4 Modes & there is a normal mode, that is when no light is ON in the cluster
it is empirically proven that Eco Mode will not necessarily increase your average if you drive with medium throttle in Normal Mode
Eco Mode reduces electrical output & hardens the pedal which leads some drivers to push it even harder and thus reducing average
use both modes on similiar routes for 3 days and note figures to see which mode suits you
i always like to us Normal
i only use Eco Mode when in traffic jams since its is effective there
Source: Prius User Since 2007
wassalaam