I know my car is only one example, and I tend to discount anecdotal evidence, but FWIW: Accepted on redelivery Nov 2007, very rarely driven in the Winter, I commute to work and back on the nicest days 2 miles each way, on weekends I might put a hundred miles on the car, occasional track days. In short I am a battery's worst nightmare. The engine has never failed to crank like new and start immediately.
I don't lock the doors in the garage either. So what's going on? Did I get an upper third sigma battery or what?