I really kind of hope they do. Having tried a Note 3 for a few months about a year ago, and checking out the 6 and 6 Plus at the Apple store, I've really come to appreciate the form factor of the 4/4S and 5/5s.
I've actually been on Swappa and Apple.com A LOT recently considering the 5S 32GB as an upgrade from my 5C (Swappa makes me leery though that I'll get burned or have a bum battery or something).
I figure it might be my last shot for a while at a smaller handset, and at least with the 5S, I'd have touch ID and a faster processor to hold out for a while. The issue is, of course, I can't quite talk myself into pulling the trigger on a 400-600 purchase when it's not a ton better than my 5C....
Decisions, decisions....(feel free to weigh in and give me your opinion!)
EDIT: speaking of which - isn't there a second-hand buy/sell forum here on mac rumors? I've heard people talk about it, but never been able to find it. I feel like I might be a bit more comfortable buying from someone here, then an unknown on the internet.