Um... seems the same to me. I got 5:30 usage (almost all internet/email @ 30% screen brightness), 17 hours standby when the 20% indicator hit. That's right about what I average.
My wifi connectivity without a doubt is much improved. It wouldn't auto connect to my LinkSys router, everytime I woke up the phone I'd have to manually set it. Didn't have to do it once last night.
Look folks, as a software engineer for 12 years - straight up, it's a bug update... it's just a build release, not even a minor release. It doesn't have to have a single aesthetic change. No new features. Nothing that the naked eye could discern. That said, this phone is buggy as all get out. Nearly every single app crashes (I've even had notes and the stock page crash on me) - a plethora of bug fixes, no matter how minor, is much welcomed. There could be dozens or even hundreds of issues addressed.
It's a good thing. Be happy about it.