sure aa like that? i believe every team will go all out during testing to ensure their performance is on par or better than other teams as well as as checking mechanicals reliability. otherwise they will just waste investors's money to travel from one country to another without any real purpose.We can't really judge who will win the 1 GP of 2007 by looking at pre-season testing results.
Some of the team did not give 100% in testing.
if they lack in speed or other aspects, then they will use the testing data to improvise before the season starts.