Everything was perfect after the update and it still is this morning; zeros with straight line for level, etc.
TBH, I bought the phone from Best Buy knowing it was a problem a couple of weeks ago. I only bought it because my contract was up and I wanted my new sailor son to have a smartphone before going overseas for three years--gave him my 4S. Anyway, I took a risk with the 5S thinking that if it turned out to be a hardware issue I could return it. The issues didn't affect my usage at all as I use none of those features anyway, but I was thinking it would affect resale value. My 14 day period is up today, glad it was fixed. At least on my phone anyway. 🙂