Brakes are really dependent on driving style; how hard you drive, how hard you go into a corner, if you only brake hard in a straight line when you come to a stop at lights, etc.
Personally I've found the idrive conditional maintenance notices rather accurate. But mine started out with 50,000km life from new. Now after 5,000km, my rears are down to 45,000km but my fronts are still at 50,000km. Strange, but the pads do look like what the idrive say they should be.