Yeah, every *novice* race driver claims that they can stop faster without ABS.
This has been debunked even on 20 year old ABS systems. In Finland - with professional rally drivers. Yes - on perfect conditions when the driver has the power to start whenever he likes - the non-ABS braking distances were a little bit shorter. But when you introduce even 1 unknown variable (not knowing when to start braking, unknown traction below the wheels, distraction during braking) even the professionals failed to stop faster on non-ABS car.