I was extremely surprised when my pads still hadn't been changed by about 28000 miles.
In the past, I've had car pads wear out as low as 9000 miles.
So I was beginning to think the Audi pads were made of granite.
I wouldn't call 24K miles bad, but most of my driving is A/B roads, so I will inevitbly do more braking than your average M-way driver.