Yea I don't drive mine much either. I'm officially at 2100 miles now. The track is so close I leave them on most the time and just put her back in the garage when I get home. With only 2 lines in the tread to make them legal, I too would agree they are going to wear fast for everyday use. For me they are wearing very good. I am actually surprised.
Have fun with them, it's a whole different car. Warning though, you will get used to the power eventually. It feels alot different when tires are not slipping anymore and you know it's giving all she's got. I can understand why speed junkies need to keep getting a faster car.