I thought I saw a thread on this once, but can't find it.
Why do the front brake pads not sit flat against the rotors? There's quite an angle, with the outer edge of the pad apparently worn about twice as much as the inner edge:
This is with about 42.000 miles on the original pads.
It's the same both sides on my GLI, and on my wife's Jetta.
I had my daughter stomp on the brakes with the engine running, so I could see what happens. I expected to see at least some tightening or flattening of the brake pads against the rotor, but didn't notice any movement at all. Brakes seem to work fine while driving.
Rear brake pads sit perfectly flat against the rotors.