Well before I handed my new 1 week old iPhone 4s back and got a replacement cos of some hardware faults, I had restored it 3 times the 3rd time I did it I did not synch so I had no music no apps, just contacts, I had most if not all functions off and it seemed to help.
New phone I did the update, restored it charged added my music and apps etc, I have everything turned off ( its not smart at the moment) I have made a 17min call sent and received about 10 texts since 5:50am until 5:50pm at it was about 70% I then played a game for 3 mins(timed) checked email for 2mins( timed) and turned everything off, when to 67% then from about 7pm- till now 9:15pm its just been sat doing nothing as, and it is not 63%.
Now I think its better then it was with old phone, but I still think this is poor, I have everyting off and I have hardly used it.
I do think it has an issue when you add apps to it, I also think the battery indicator is a little faulty, but I think the big issue is the trying to grab on to 3G signal not mobile Internet signal!! if you have poor 3G in your area like me it will keep trying to find it and that drains battery.
I know this because when I had the HTC I had same issue then I could change the settings for the 3G and it worked a bit. But the android smart phones are not much better when it comes to battery life
SO yes I do think there are some bugs, but I also think that it can be ironed out, try restoring your phone 3 times and not adding apps, just contacts and music, turn most things on and you will see a little improvement maybe. Apple do need to address this because as it stands I will never get 200/300h standby as they state.