Well I downloaded and installed IOS 8 on my iPhone 5s. Typing PMs is now a breeze. The fonts appear a little larger and the Quick Type feature is great. It predicts a number of choices of words but doesn't auto correct them. Instead it lets you choose from the choices.
I'm so glad to see Apple finally adding this. I had been a long time Android user who moved to iPhone (long story), and have been relatively happy with my 5s. I don't like to be an Apple basher, as I feel both have their strengths and weaknesses. The 2 things that annoy me to no end on the iPhone, however, are the iPhones crappy keyboard (and lack of word prediction and ability to use a 3rd party one instead), and the crappy notification management.
It's good to see Apple is addressing one of the two.