ABS is just going to throw the car off balance on corner entry, and when you are shooting for the fastest possible single lap the last thing you would want is the car trying to shake itself to pieces as you are trying to tip it into a corner.
ABS also increases stopping distance in my experience, as you have gone for too much pedal and the ABS isn't giving you the full brake force.
My opinion is if the ABS is going off in the dry than you have crap tyres or you are just stomping on the pedal with all your might
In summary - ABS is great for enduro cars or targa cars that need to run on the same tyre for long periods, for SuperLap/sprints etc it is just adding weight.