BBC technical analyst Gary Anderson has done some number crunching based on Jerez and has on conclusion provided us with a pecking order. He says Mclaren lead the way, with Mercedes and Ferrari behind. Lotus a not far off the top 3, but shockingly he has concluded Red Bull are currenclty not on par with the top 4 and appear to have a lot of work ahead of themselves.
Here is the full report: http://www.bbc.co.uk/sport/0/formula1/21417831
What is also worth noting is that according to Sky Button’s fastest time was also set on the hard tyre, when the track was still green. So if Anderson’s number crunching is correct Button was still about 0.2 of a second quicker than Vettel. That said this is all still incredibly speculative at the moment, but it is still fascinating!