You don't need any math formula to calculate when a driver is screwing up all over the track. From the start of the race, Ralf was strugggling, and making a total ass of himself. Spin, insanely slow, pit, spin, so on and so on. The second most expensive driver in the most expensive car, what a waste. On his worst day, Sato may have driven as slow, as stupidly, and as unprofessionally as Ralf did today, but there's absolutely no excuse for Ralf.
The stewards need to look at his telemetry, and if he lifted or slowed in any way to force JV to drive into the marbles, he deserves to sit out a race or three.
The track was terrible, it was breaking up in certain sections, and the marbles at the end gave only one driving line. Both Montoya and Fis proved they are failing in driving at the upper level on top teams, while Alonso, Shu, and Kimi once again proved that great drivers prevail, no matter what.