Every woman I talk to now says the iPhone 5 is too large for their clothes. Fortunately, many seem to be more upset with the fashion designers making small pockets than Apple for the phone. They don't want bigger phones.
It will be a win-win situation. Apple has a hit with the 5S, so they will keep that around for a long time. So why not make the bigger screen for that want it. I think there will be a major upgrade cycle ahead if they introduce a bigger iPhone screen.
Sentiment: Strong Buy