Yes, that's true, When you drive Auto car, on Red light you put your gear on N is alway good, but you need to step on your break all the time, for small japanese N or D is no different, but for full size American car 6 c 3.0-5.0L, Put on N isteand of G is always good, there is different.
By the way, driving amerian car is much better then JP car coz you will feel saftey even American car consume more gas then JP cars, I still like American Car. Gas is nothing, Satey is most important.