I would like to mention some situations that supports my statement.
1> Aussie 05.
In a superior car.
Webber got overtaken by DC and tried to pay back and fails, almost crashing.
2> Sepang 05.
On better tires.
Webber crashes Ralf and Fisi, almost get seriously hurt.
3> Bahrain 05.
On better car and tires.
Webber tries to overtake Rubens and niente.
4> Monaco 05.
On better tires.
Webber spends several laps behind Alonso on bad tires, then Nick goes by Fred smoothly and Webber follows the example, but w/o class.
5> Turkey 05.
On a better car.
Webber fighting for the 10th? place crashes MS and makes him to abandon the race.
6> Bahrain 06.
On better engine.
Tries to overtake an ill powered Fisi and looses a lot of time behind.
Finally overtakes him tankfully to a off track excursion of Fisi.
7> Sepang 06.
On better engine and lighter fuel loads.
Driving the most powerfull engine of the grid and on lighter fuel load tries to overtake Fred along several laps.
MW pitted after 14 laps and FA after 26 laps (2,7 kg x 12 laps = 32,4 kg).
MW was at least 0,5 sec faster than Fred.
Maybe MW sandbagged due to his bad memories on this same Sepang trying to overtake a Renault. If he had troubles overtaking Fisi, the buona gente, imagine the problems to overtake El Matador.
Or maybe MW was waiting for Nick to come by and show him the way...

Is it me, or what?