Yes, mine is terrible too. Loses 1% every two minutes literally while in use. Dropped 16% in standby for 5 hours with no use. My iPhone 4S would lose only 2-3% a day on standby and I never had any problems with it.
Also I notice that processor performance is sporadic. The more its charged the faster it operates, but not always. Last night the OS was blazing fast and today it's slower than the iPhone 4S on a full charge while being plugged in.
Both my iPhone 4S 64GB and my new iPad 32GB came with 80-90% charge. My friend's new iPhone 5 32GB from AT&T came with an 80% charge. My new iPhone 5 64GB for Sprint came with a 50% charge.
The battery charges rapidly but also loses power just as rapidly. I've had all apps closed, Bluetooth and location services turned off, etc. I have done a restore from my 4S backup as well as a fresh wipe and same issues. I am not on LTE because Sprint doesn't have it turned on in my area yet, so only 3G from them but I'm on Wi-Fi mainly anyway.
Are there a bad batch of phones out there?