As new cars get faster and faster, more car manufacturers are equipping these cars with super-sticky Max Performance Summer tires.
For example, consider the 2008 Mercedes-Benz SLK280.
All the Mercedes Original Equipment tires are fast-wearing summer tires. Coupled with the fact that you can't rotate (rear wheels and tires are wider) it's difficult to get decent tread wear.
Try Ultra High Performance All-Season tires instead. Unless you're a very fast driver who's always taking 40 mph curves at 80 mph, you'll get better wear without significant loss in grip and steering response.
So, even though you might be in Los Angeles or Tuscaloosa, an all-season tire might be a better choice.