It doesn't matter how quick these cars are, since the reason why the prius wastes so much energy is that it lands in the hands of lefty owners, where it is then used to create a steady wake of fuel wasting traffic congestion. The smooth flow of traffic gets interrupted, ad all the other cars end up using more fuel when a lefty prius driver is on the road. The lefty behind the wheel is where the problem is. Everything lefties touch breaks, dies, or turns to shit.
I got stuck behind one on Saturday climbing the twisty 2 mile climb to my mountain cabin, twenty five fucking miles per hour the whole way...