Why would fast acceleration and deceleration be more efficient? When you drive an electric car it’s usually the opposite: fast acceleration drains the battery fast, and slow deceleration allows for better regenerative braking without having to use the actual brakes.
In the context of ride sharing, though, it's likely that you spend most of the time in most rides going much slower than the ideal top speed. Most ride shares are heavily biased towards city driving with frequent stops and relatively low speed limits.
