Just changed the discs and pads on my 2012 Aygo at... 38k and I suspect they may be the original set ! which is remarkable seeing as I've read a lot of posts complaining they only last 20k.
They weren't new when I bought the car a year ago (18k) so at worst I've got 20k out of them, but likely more than that. When I took the pads off they had 12/03/2012 date stamped on the back. Could indicate they were the originals (or old stock)
My friends sometimes call me last of the late braker's so I don't exactly go easy on them, although I do 50miles round trip to work every day mostly on the motorway. So for me at least I'm happy with the mileage I'm getting out of them.