At multiple points in my career I stumbled upon stuff from Bredan Greg. He is highly skilled in large-scale distributed computing but also down to the nitty gritty details (bits).
On tarmac you slow down faster with ABS. The friction is higher when the tires are _not_ sliding. Fastest deceleration happens just at the point before tires would start to slide.
On gravel/snow, ABS perfoms worse. But 99% of the time you likely are not in such a context.
I was curious about your statement, so I looked it up:
> ABS increases stopping distances on surfaces covered with gravel, snow, or other loose materials. In such situations, a locked tire digs into the snow or gravel, pushing it forward and forming a wedge in front of the tire, which brings the vehicle to a stop
