I think Williams probably went from a more wet set up in the hope of getting higher up the pecking order, eventhough we are expecting a dry race tommorow. A gamble that paid off, yes the track gets better with each lap that passes but he was over a second faster, that is surely down to using a wet set up........?
On a personal note I hope the vettel smashes into the hulk, picks up fernando and hamilton looses his wing, allowing that handsome man webber to go on a and win
Not sure about the wet setup, Hulk was nowhere in Q1 and Q2 where it was a lot wetter.