Well those are very fine numbers!
I'm using an iPhone 4S and I have recently installed iOS 7 GM. I did an clean installation by using DFU. I have installed my iCloud backup and turned many settings off, like: location services (iAds, diagnoses and uses, popular nearby, timezone, regular used locations), updating apps in background (latest news), turned off bluetooth, deleted facebook app, reduced advertisements, reset netwerk settings, reset settings.
I have read this could be the solution for a better battery life, but here are my results:
usage: 2hrs, 33 min.
standby: 5 hrs, 22 min.
batt: 34%
I have used my iPhone only for sending messages through whatsapp and imessage.
What would you guys suggest? The last thing I can try to do is set iPhone as new instead of using an iCloud backup, but I hope this isn't the solution, because I have a lot of (important) info in iMessage.