Completely different phone
After the update, my battery life has improved amazingly. I used to unplug in the morning after an hour, my phone would be down to 90% or 88%. Right now I'm on hour 13 and I'm still at 73%!
I also began using an app called Easy Battery Saver at about the same time. I use my phone about the same but WOW. I could uninstall for a day to see if it really is just the update, but, naaaah.