Probably brutal thats why they probably installed a Weisman gearbox to handle the instant torque of the motors
A friend of mine works at a truck body shop, they get these busses from the schiphol airport and has to drive them back sometimes.
They are software limited in acceleration, probably to save the battery health and endurance and look how nicely and very distant they are from anything else.
Each bus does only about 130km before needing a recharge, they don,t always make it! :p