--The act of stopping is still expending energy. There is frictional loss in the tires, drive train and heating loss in the recharge of the battery. You only expend 68% as much energy to stop assuming your energy recovery is similar to the best efficiency that a Prius (32%) claims to deliver to the road.--
No. The act of stopping is the conversion of energy, motion into heat. If we have regenerative braking, we divert (recover) some of that energy to be used later. I don't know where you get the 32%. Battery cycle efficiency is about 85% and I really doubt that drive train losses would make up the rest.
Efficiency studies on the Toyota Prius claim that it delivers 32% of energy from the gasoline it consumes to the road compared to only 16% for a conventional gasoline engine.
The efficiency of the charging cycle for a battery connected to a wall charger may be 85%. That is your best case. After you subtract the losses in the drive train and efficiency of the generator, those losses are added on top of the 15% inefficiency of the battery charging process. You're still throwing away more than half the kinetic energy of the moving vehicle to bring it to a stop.