Also odd how you would dismiss an extra 2-3 mpg so readily when you are defending those who adapt there driving style to probably gain little more.
I am not dismissing, the point i am making is your often better off trying to save 2/3mpg in the current car than switch only to find you have saved 2/3mpg but alot quite a lot of performance i.e. your actually no better off ..and don't have the chance to go and have a blast when you want.