Yes. I can type faster on my iPod touch or my friend's iPhone then I can on his netbook that he uses in class.
With the iPhone (and likely iPad), you'll know what to expect from the device soon enough. With the netbook, I can never quite shake the "This isn't quite a computer, even if its pretending to be one" feeling and get used to the keys being 10% smaller.
Small, cramped, hot, ugly.