Some early ABS systems were absolutely terrible.
I had a 2008 SV650s with ABS. Those brakes were f-ing terrible, borderline dangerous. They wouldn't lock up, but took forever to stop.
Honda C-ABS is fantastic though. I had it on my CBR and VFR. Very few riders, if any, would be able to out brake that system.
All of the newer ABS systems should be good to go.