it's just in your head, confidence is the single most important determinant when it comes to lap times, this can be said for the other things such as brakes and tires, it's really hard to tell if the upgrade's is the main contributor to the better lap times or the driver's confidence level, (most cases it's combination of both) or which contributes how much.. that's the reason why professional drivers who repeatedly puts the same lap times can only see 1-1.5 sec difference between R comps and High Performance tires when a novice drive can improve almost 4-5 secs (depends on the track of course)
.. VSC give you that confidence ..when you completely learn your car and spend more time you will notice that it actually holds you back,
I love pedal dance