Does anyone actually consult with women when coming up with these criticisms of "too small displays" for the phone? My wife thinks the iPhone 5 sized display is starting to push the size for her hand, and the Android phones are just way too big. Almost all of her female friends, some of which own Android phones and some of which own iPhones agree - the larger size just stinks for those with smaller hands - typically women.
I'm of the opinion that Apple has hit a sweet spot with the iPhone 5 display, and shouldn't change it. Bigger is not necessarily better.
Most women - just like men - have two hands. Even the largest phones are small enough and holding them is never an issue for anybody. One handed usage is a different matter. It might be important for those who use phones while driving or riding a train/bus (and standing).