I can type faster on the touch screen than I could using any other phone. I wouldn't be surprised if I could type as fast with it as I can with a full size keyboard. That's probably an exaggeration but i have no problems typing a full length email. If I had to guess I type around 30 WPM on it. (edit, just ran a typing test and came up with 28 WPM, with 1 error).
There is a lot of iphone hate in the world, if you want just a phone that it's probably not for you.
But if you want something that can, make calls, send txt, send email, organize your life, take pictures, play music, play video, play games, IM, calculator, maps, weather, note pad, youtube, stocks, to do list, surf internet, radio, draw, read documents, remote control............. Then you will be hard pressed to find something that can do all this and functions as smoothly as the iphone.
To each his own.