Speaking of updates ( from http://www.bbc.co.uk/blogs/andrewbenson ) :
"A large part of Red Bull's aerodynamic performance advantage so far this season is now believed by rival engineers to come from the design of the rear of the car.
They have sited their exhaust exits low down, blowing into the 'coke-bottle' shape of the bodywork and through slots in the floor of the car into the diffuser. I'm told by aerodynamicists from Red Bull's rivals that this is worth at least half a second a lap.
Ferrari are introducing their version of the design in Valencia, with McLaren aiming for the next race at Silverstone or possibly two weeks later in Germany. Renault, who are not far behind, have one due soon, too."
A mon avis Renault va d'abord améliorer son plancher à Valence et ensuite valoriser le diffuseur avec les échappements pour une date ultérieure.
NB : Si c'est exact, les avantages des Red Bull font fondre rapidement