The Conti DWS can wear a bit funny on the outer tread lugs. Since they are not directional, but have an "outside" you can rotate the tires side to side to even out the outer tread lug "heal/toe" wear.

Also the tires do not appear to be close to the tread wear bars, the "S" is still clearly visible in the "DWS".

Just because the "alignment" may be good, there may be play and slop in the suspension. Front bushings last about 70k miles at most depending on the road conditions the vehicle is regularly driving on. I have seen some bushings last only 30-40k miles, some go closer to 80k miles.

For the rear, same type of thing, you can align to specs, but if the bushings are sloppy, while you drive the "alignment" is no longer aligned and the suspension has uncontrolled movement outside of the expected specs. This suspension slop can and will cause uneven and rapid tire wear.

__________________
2008 4.8i Black with Tabacco. Black Y-spoke wheels and shadowline trim.