oldschoolto
Contributor
Would not slide on ice if they are working? What kind of ice? Not pure sheet ice, I presume?
Well I did a real world test today...

Test one is my wife's 2012 chevy impala with dunlap graspic DS-3 ice and snow tires new last year... At 35 mph I hit the brake and the car stayed straight and the tires never locked up... It did take a good 300ft to come to a complete stop... Also a ice/slid warning light lite on the dash... Computers are great when they work
Test two was my 2008 grand-prix with the same graspic DS-3 tires about four months older but really the same as far as wear... 35 mph hit the brakes and not but a second later the car started sliding and tires were locking up, had to release the brake and recover the car with very light throttle/brake inputs well steering into the slid.... The ABS on that car was not to good.... But there is no ABS warning lite on.... The computer thinks it's working A'OK...
New ABS brakes will stop a car on glare ice if you have good ice tires.... And now back to diving....
Jim...