I think your pads will last a lot longer if you break earlier in advance. In severe winter driving, this is a good practice because on sheer ice you cannot brake suddenly, even with ABS I believe. I don't think braking hard at the last second is good, because I've seen too many tailgaters who are on your ass thinking they can stop on a dime, and it pisses me off. I mean, what if we drop our cell phones or cigars, we will have less response time to react if we are too close to another car.

PS have you tried the new dustless metallic brake pads I've heard about? These would keep my rims looking a lot better in the front, that brake dust is a bugger.