I think the ABS is a great inclusion personally. Road cars in real life have it, so why not the road cars in LFS? Leaving it out would make the sim *less* realistic. And of course, it's likely to make laps faster; the whole point of ABS is that it shortens braking distances and helps maintain control. I'm not saying that it should necessarily be used in races (the ability to ban ABS at the host's end would be a great idea IMO - I'm all for racing without ABS), but it's just an extra facet of the sim. Perhaps something to use on cruise servers, or just for playing around with. It could also help new drivers, as a learning aid.
If the racebred cars all had ABS too, then that'd obviously be unrealistic and would cause real problems, but since it's just the road cars, I don't see what the problem is.
Oh, thanks for the patch Scawen! The new shadows are a great improvement. :-)