Hi Juanito.
I just double checked and I didn't say that ideal setup was faster. I asked the question... "What makes you think ideal setup isn't the fastest?"
The thread was discussing practice lap times to determine the best set up and as I pointed out even if you use the same setup and tyres for all five laps the practice times vary so widely (because driver errors are enabled) that they cannot be relied upon to determine the optimum setup.
However, I still believe that from my experience, during a race a driver performs better with his personal "ideal settings". But you are correct that now the devs have turned off driver errors it allows us to disregard this as a reason for differences in qualifying.
For information:
Tonight for the 21st consecutive race my two drivers in "Premier International Racing" league set identical qualifying times. This is the team Skid Marks Junior
The two drivers are the same height (hence same set up), same age, same gender etc.