Yes I noticed this myself last night after the update had completed, I'd plugged my phone in to be on the safe side and while ever there is power going to the phone it appears that the lighting symbol will always appear to the right of the battery.
Regarding the charging I came across two methods to do this, but it only works if you're charging/connected to power at the same time. Firstly, check the battery icon itself in the top right, also if you have percentage turned on this should show 100% if not see below. But the best way is to put phone to sleep then press the home key you'll see the current charge listed directly under the time for a short period, but only if you are currently charging/connected to ac power.
If you want to see the percentage then select Settings>General>Usage and scroll down until you come to Battery Percentage flick switch to green to turn on.
Regards,
Steve