iPhone 5 has the same width so it types EXACTLY the same as previous models. The iPhone 5 and its enormous "extra .5in" screen offers more benefits than drawbacks. And even with small female hands then I find absolutely no difficulties in "holding" a product that is both thinner and lighter than its predecessor.
It's difficult to reach the top options without repositioning your hand. Even when you reposition it's extremely unconformable to reach the top and start typing again. Average male hand here and I know there's no way a small female hand can reach the top and start typing without repositioning your hand. When the iphone was 3.5inches you could easily reach the top, type and press anywhere on the screen using your thumb without reposition. Makes it easy to use and fast to type. Every application have top options and every time I reposition it makes it unpleasant experience.
What benefits does .5inch screen have if you don't watch movies or play games? You get more space but I don't mind scrolling a little bit more for applications and web browsing.