Hi, David,
My 4S is quite new, bought a few days ago. The battery life is not that ridiculous but still not satisfactory for a new phone. After I saw your post, I followed your method EXACTLY step by step. And I've try the whole process twice, but haven't seen any improvement. Here is my battery data:
97% 25min usage 1h22min standby
84% 1h5min usage 3h34min standby
68% 2h2min usage 4h55min standby
53% 3h12min usage 6h27min standby
39% 4h9min usage 9h27min standby
16% 5h29min usage 12h48min standby
You might think it's not too bad, BUT the data is not true! I didn't use my phone that much, and my phone is generating usage all the time when left standby! So I guess something is constantly running? (but I normally shut down all the background apps after using them.)
The true data is: Currently my battery drops about 2% per hour when standby and 1% every 3min when in slight usage. I've also found that when I go to some places where the '3G' disappear from my top bar, my battery can sustain twice as long (1% every 6min in slight usage).
I'm thinking about changing for a new iphone or waiting for 5.0.2. What should I do? Help!