I type faster on an iPad. Touch typing is much faster since there are no buttons to depress. If you're a touch typer, the iPad is about as good as it gets. Unfortunately, there is still a tiny bit of lag but it's understandable and I've stopped waiting for the text to catch up because I already know it will autocorrect things and adjust to my typing.
I don't like the on-screen keyboard. If I set it to split mode, it's better but it's still a bit unwieldy to hold AND type. Unfortunately there isn't a way to dock the split keyboard all the way at the bottom of the screen (close but not all the way) which I think would probably be ideal for me. I'm far faster on a regular keyboard or an iphone.
I had to learn to trust the auto-complete while I'm typing, and then edit after writing instead of correcting as I go along. I comfortably take notes in meetings, write in a journal, work on a novel, etc without using my Apple bluetooth wireless keyboard while I'm on the go. If I'm at home and trying to hit a word count for the day or something, then I might bring out the bluetooth keyboard.
Another colleague has an iPad with the Zagg Folio keyboard and can't type on the screen at all, he has to use that keyboard. For me, after nearly 2 years of iPad ownership, I learned to ditch the bluetooth keyboard and make the soft keyboard work. I can type as fast as the guy next to me in meetings, directly on the screen.
It's OK. I use my iPad as my main notebook, so when I take a lot of notes I use a Logitech external keyboard. I send short emails and browse the web and such with the virtual keyboard.
In general, I'm not too impressed by the iPad keyboard. My Android phone allows for a third party keyboard that increases typing speed with about 80% compared my iPad. I think Apple is lagging behind in that one area. Otherwise I love my iPad.
iit's ok. i prefer to use an external keyboard + incase origami combination. it's quite nice, especially for a touch typist. i get about half the speed and twice the errors with the virtual keyboard. yeah, i know some people poo poo the idea of an external keyboard, but whatever. it works for me.