First of all i'm not transferring files via usb (only if there are many small files), i set up an ftp server on my phone and connect to it via pc.
Brightness is at the lowest setting that you get with "disable auto brightness" enabled. And i even found that too much sometimes late at night.
But during that time i used maximum brightness for a short time as well to read a pdf.
Wifi is in my room. baseband 64 with very good signal reception (full bars) and 2g only. (data disabled)
I'm not trying to say that everyone should get the same battery life as me. In fact you should NOT get that much battery if you are using your android phone the way it was meant to be used.
And that is: the "always on" nature with updates and notifications etc.
What i'm highlighting here is that the version does not have a deep sleep issue at least. If it drains too much power while using some phone functions, that's different...
One twitter app that checks for new content every 5 mins would be enough to never let your phone deep sleep for example.
Anyway, after downloading an listening another 1.5 hour long podcast yesterday, here is the final picture before i charge my phone.