What would be your reaction is there is no 4" iPhone 6?
All the rumors are currently suggesting 4.7" and 5.5" as the 2 versions of the iPhone 6. We haven't heard anything about a 4" version.
What happens if 4.7" is indeed the smallest size of a premium iPhone from now onward? The entire Apple argument for one handed use would be totally destroyed if going small meant choosing an inferior device. 4.7" with a home button and symmetric design can never be small enough for one handed use. Heck even without symmetry it will be too big however you cut it.