I ordered the full colour display from Luna and in the advance settings you can tweak a number of things. The motor shut off has worked flawlessly so far at whatever the stock setting is. I stop pedalling and it is off almost instantaneously.
I was showing a friend my bike the other day and lifted the back tire off the ground and held throttle... Speedo topped out at right around 70km/hr in my 3rd biggest gear... I can't imagine riding using the highest pedal assist, in top gear and pedalling all out....