I think you are going too far now. If you don't feel confident about something please read and search more. There are PLENTY topics both in Android and XDA forum. Go and read, i am begging ya.
And how come some guys or someone consider a ROM/OS based on battery life? Jesus Christ! I can post screenshot of achieving 7 hours screen on time in GB, which i am yet to achieve in ICS. Who uses Stock kernel? And the kernels are finished, polished and more well modified for GB, while all the devs are still building their kernels for ICS. So NO WAY you can achieve something which you achieved in GB.
Now if someone cheers about some kiddish feature like Face Unlock and else then use ICS!
If it's ONLY battery info you want it's neither optimized nor got better in ICS. AOS bug is still present.
And if it's not about battery life only, then what i said remains and it's the fact. I am NOBODY. But there are way too many ELITE RECOGNISED members in XDA, whose posts i read every day, for at least an hour. And i am doing it for last 12 months. So what i said is 'NOT ENTIRELY MY OPINION.'
And one more thing you CAN'T device who is gonna post what, right, unless someone is trolling/spamming?
(Again, what i said is applicable for Stock ICS ROM released by Sammy, not for any AOSP/AOKP or any other custom ROMs which are modified by its dev)