Or one easier solution: just keep satisfied with your skills when you beat NEDC (as am I) and if you want, change your personal rating (lurker, master acomodder etc...) to "NEDC hypermiler". (which I probably would)
Or hopefully our great and smartwise EU administrative will make more realistic tests ( which I doubt).
EDIT: Just stroke me: mikeyjd here on ecomodder is doing vacation in France (thread here:
http://ecomodder.com/forum/showthrea...nce-34165.html ) and back in the U.S he is doing some good hypermiling (much more MPG than EPA rating of his cars), and he has rented Renault Trafic (according to the thread), with NEDC rating 5.6 l/100 km. So now we just need to wait for results. I know it is not scientific testing, but at least it can answer how hard/easy is to beat NEDC