I don't like low profile tyres, apart from the dreadful ride they can also damage easily, both my cars use 195/65/15s they have much more give in them than your 17" and I would think should last longer, I would also think that they are cheaper. Are the tyres wearing evenly? if so you can rule out alignment so unless you drive like a boy racer I can only put it down to the tyres.

Modern cars do seem to be heavier on tyres and I have seen people complaining of worn out tyres at lower mileages than yours but my old Citroen XM will do 30,000 on the fronts.

I reckon 17000 miles is a good result on the front of quite a powerful car.

On my Passat I swop the front to the back after about 9000 miles, so I usually need a new set at 18000 miles. I prefer to buy 4 tyres together, I like the same make. The car came on Dunlop 200Es, they were terrible in the wet,. Since then I've had Continental Premium 2s and Pirelli P7s. There is nothing between them, they are very good.