Loeb tested the car after all 3 other drivers completed their tests. Also he tested in France (check the signs on the vids) on smooth tarmac while the others tested on the actual stages in Germany.
I see it quite unlikely that the drivers will change their setup found during 2-3 days of testing (each) based on what Loeb found during 1 day in France. For now it was imo more like "development feedback".