That’s actually false.

The Mini has a tiny LCD screen just above the wheel showing all the same information as the center dash cluster:

http://i.imgur.com/fxa308W.jpg

Specifically, above the wheel you have to see total range, speed, and fuel/battery status.

Which Prius? 2007 had it available in the deep well with a mirrored display over the steering wheel, not in the centre (http://l7.alamy.com/zooms/1f0271de306e45aab983f8c2c6e0f6ad/2...) Later models had either that or a heads up display on the windshield.

My Prius Prime has two speedometers, an on/off HUP in the lower left field of view, and the sort-of-centered display common to all Prius-es.