Hmmm, I hope this isn't indicative of what I can expect from the 6MT coupe that I just bought two nights ago. The BMW I traded in had a similar problem - After 8000 miles or so, the tires would get really noisy and the handling would get "twitchy". The shop confirmed that the tires were cupping or feathering, but they could never solve the problem even after multiple alignments. I had three sets of tires on the car in the three and a half years that I owned it, and I'm not that hard of a driver. It was one of the reasons that I decided to get rid of the car (that and it being an automatic). I hope I didn't just buy the same problem all over again! I don't expect 30,000 miles out of summer performance tires, but I would like to get at least half of that out of them without them turning into a noise factory.
At the same time, I guess you have to just deal with this kind of stuff given how sport-oriented cars are setup these days. To get the cars to really stick in turns, they dial in alot of negative camber. In the long-run, this can pay a toll on the tires.
I guess we'll see.