I've been bouncing back and forth between this discussion and its sister discussion on the Apple Discussion site...
https://discussions.apple.com/thread/5358002?start=0&tstart=0
The two sites often quote each other. Too bad they somehow can't be merged.
Here is my personal experience with the issue. I am a physics/astronomy teacher so, admittedly, I come at this from a niche perspective. Still, one of my main points is that whereas the sensor issue may not be problematic for some due to their needs of a smartphone...for others this is a definite problem. The iPhone 5S, based on its advertising, should (IMO) be able to serve the needs of all constituencies.
My family owns 3 iPhone 5S's (32GB, Space Grey). All exhibit the same "personality" below.
I am not much of a gamer, so I can't speak to the problems those apps are, or are not, enduring with the sensor issue. However, as an astronomy teacher, and I can speak to the problems the sensor issue has with the many planetarium apps (SkySafari+, Star Walk, GoSkyWatch, GoSatWatch, Sun Surveyor, etc.). All these use the iPhone's sensors to orient the screen to the sky. I had installed iOS 7 on my iPhone 4S and used these apps for a couple weeks with the new operating system before getting my iPhone 5S (traded in my 4S so it is gone now). What used to be smooth running apps with excellent and stable alignment of the iPhone screen relative to the sky are no longer.
For example, Sun Surveyor contains a functionality that allows the app to display the camera screen with the sun's path (past, present, and future) superimposed on the real life camera screen view. It is/was amazing. On the 4S, the app was spot on and stable. The compass and level sensors worked together to nail the postition of the sun in the sky. Quite amazing.
Now, on my 5S, the superimposed path jumps all around the screen as I hold the iPhone 5S steady and pointing toward the sky. The compass sensor can't sustain a reading of the iPhone's orientation and so the app keeps moving the path of the sun back and forth across the screen as it "thinks" the iPhone is being moved (which it is not).
The app is now useless and I can't believe the developer is pleased.
Whatever the solution, one can't come too soon for me and my students.
One last thought...if the rumors are true that the new iPads will be introduced on Oct. 22, I would imagine, from a marketing perspective alone, that Apple would want to resolve this issue by then. If the new iPad has many of the same internals as the 5S then it will be natural for
some to balk at its purchase if there is not some resolution to this issue before Tim Cook steps on stage. I know I would not want to be Tim with the 5S having this problem and I am trying to promote a product that could have the same problems. I would think that Apple is working somewhat feverously for a software/firmware fix (if one is possible) so that Tim can go on stage free of fear that someone may stand up during the presentation and scream...
"Before I buy this new product, please tell all of us WHAT are you doing about the sensor problems!!!!!"
You know what I mean?