Not trying to challenge you at all. Just relating what I have seen with the i5. My wife and I both have them from the first day of release. Every time we do an update, we see usage spike for a couple of days, then settle out.
I also manage the wireless program for my company and have over 30 i5's out there now. Nobody is screaming about some of the horrible battery life experiences that many in here have reported, but that's not to say that people arent experiencing issues and not speaking up. I would just expect that with well over 30 handsets out there, spread all over the country, I would be getting SOME complaints.
My phone is plugged in and sreaming radio on wifi right now, so I cannot comment. I also updated my iPad Mini this morning at about 5:30am and now, at 4.5 hours later, it still displays 100%.
I'll toy with the phone over the next couple of days.
BTW, I have noted a significant improvement in wifi stability and speeds.