It has been proven in test after test that ABS generally INCREASES stopping distances, especially in sandy conditions, or even on wet leaves, etc. True, it allows you to continue to turn while applying full brake pressure, but you can do that yourself by braking properly, and not locking 'em up.
ABS doesen't really do anything to keep the rear in line during hard cornering. Nothing can defy physics, and if the rear is gonna swing out, even the most sophisticated stability control systems can't keep it in line. Since 1997, when the C5 came out, Corvettes have had a really solid traction/stability control system. It works excellent under most conditions; even keeps the car very stable in the snow, which was nearly impossible to do in earlier Vettes. Now try telling this to my buddy who's sweet Vette wound up in the middle of a golf course, after crashing through two fences and being launched airborne. This was because he was going WAY too fast and screwed around WAY too much - and the road was bone dry.
I think ABS kinda sucks, if you haven't figured that out already. Gives uneducated and inexperienced drivers an invincibility complex.