Well myself I never leave the car after filling up, I move out and park somewhere else to leave room for others. If I can get to a free spot I go there though.
The pumps here cant be reset until the current amount has been paid for so youre literally making a space for them to move into and then wait.
The whole "synchronised" thing doesnt hold true anyway, because half the people fill to the brim and half put a tenner in.
I move into wherever the next available space is. If people cant manage to pull out around another car they shouldnt be driving in the first place.