Not to mention that, in the country I live in, it is guaranteed that while you're idly rolling forward, some asshole will cut you off and take your place so that he can win that precious 2 seconds.
This happens to an almost comic degree in Boston. One car, invariably with Maine plates, insists on leaving five car lengths between them and the driver in front of them. By Boston standards this is a monster opening which is quickly filled and the Maine driver continues to back off. This happens the entire way through the city.