I am on my 4th set of discs (4/4 Sport 2009 - 65000kms) and 2nd set of pads because of rapidly appearing brake judder.
The first and second time the discs have been changed under warranty, not so the third and recently the fourth time.
Now I'm already (again) feeling a little brake judder at high speeds!
I heard rumours about low quality discs delivered to the factory and still being used on the cars and in the spares department.
My driving style is quite normal, not very sporty ( I did 85000 kms on my previous 4/4 - 1991 on one set of discs and pads).