Let's clear this up a little shall we:
- ABS was designed purely to allow you to steer/control the car whilst you are braking heavily by stopping the wheels from locking
- Modern ABS brakes will
usually reduce stopping distances, especially in an emergency braking situation. However, dependent on the driver, road conditions, tyres and a lot of other conditions, it is possible to stop more quickly with ABS disabled, especially on track
- On snow, ice and other slippy surfaces ABS increases stopping distances
And usually the best way to reduce stopping distances is with better tyres, not bigger brakes