Amazing qualifying. I can't remember any season in F1 with so many competitive cars.
Some quick number crunching: these are times differences between Q3 and the fastest Q1/2 times for each driver in the top 6:
TRULLI: 0.760
GLOCK: 1.099
VETTEL: 1.541
BUTTON: 1.202
HAMILTON: 1.345
BARRICHELLO: 1.397
So, it seems the Toyotas are light. Vettel is heavy (!). Button, Hamilton, and Barrichello are on moderate fuel loads.