with an additional 100litres of ballast to play this was an obvious consequence for the winter testing .with a time spread of almost five seconds between full and empty tank it is fairly easy to mask your advantages and also weaknesses during testing as now you have a staggering 220litres of fuel + ballast to play with.
Moreso you could run with a weight distribution you will not be able to have in a race weekend adding ballast instead of fuel.
What we do not know is if one of the top teams has done all their testing with an additional 60 litres of fuel on board compared to the others ,one could read something into the laps immediatedly before running out of fuel on track and interestingly merc was choosing to go slow on fumes to find the ultimate end of fuel supply..
Brawn not dominating the test could be they have not found enough to dominate or they choose to not show their card to avoid what happened last year.You just don´t want to create the hype and aditionally the competitors to get nervous starting off close the gap development starting now.so we don´t know who is best and does not blink.