The Spanish Grand Prix served up a very exciting race in the battle between Lewis Hamilton and Sebastian Vettel. But what it didn't deliver was a clear indication of whether Ferrari or Mercedes has the fastest car.
Mercedes and Ferrari are clearly in a different league to the rest in race conditions. Between the two it is going to be all about the development war and who gets the breaks or makes the best calls when it comes to strategy, as we saw at Barcelona.
My favourite way to judge performance of the cars in the first four races is by using the supertime method, which is based on the fastest individual lap set by each team on a weekend as a percentage of the overall quickest and then averaged out.