When I see a headline on hackernews saying "Real World Results" I expect a bit more than a single result with only some vague information on what was running and how long.
As for the wifi - it might be that a phone scanning for networks will use more power than a phone steadily connected to an AP in the next room.
Sounds like a bad iphone, not sure what the point of the article was. If you charge it overnight and its not full when you woke up, its broken. Not much more to think about.
It sounded like he charged it fully overnight the day before. So when he was checking, it was on the second day after charging.
Yeah I'm getting nothing like this poor performance out of mine, it does sound as if something is actually wrong with the device :(
Take it in and get a replacement. Done.
"No, you are getting all worked up. Calm down. You are most likely in an area which drains your battery faster"