It's definitely dependent on the car driver. My story is like some of the other posters. My grandfather made it to 80K on his Bronco before he needed to have the brakes replaced. When I got my dinky Olds Intrigue, it had 75K miles and new brakes / pads. I had used a little over 1/4th the pad's life by 100K. At that time, I gave the car to my wife to drive in to college, because it was the more dependable car of our two at the time (She was about 100 miles away, and I wanted to make sure she had a "reliable" car to make the trip there and back every couple of weeks). By 115K miles the pads were done.
She's still much rougher on cars than I am, but I baby them, so I know it just feels different to me. She still drives alot better than some people I've rode with.
Off topic, but how on earth do so many people just let their car puke all over itself and not notice? So many times I've asked a person "what's that noise"? when I hear something strange, and the answer is "Oh, its done that forever". One friend had her wheel bearing completely shot, and she didn't notice until I pointed out that it was raising unholy hell while riding with her. I got out and pushed the wheel and it was moving!
If I hear so much as a louder tick from the Engine on a cold morning, I'm checking things over, but I'm pretty paranoid after a few really crappy strandings.