I'm a Dvoraker, and the difference between typing on an actual keyboard and on a touchscreen is enough that I can happily go between the two.

The issue isn't about speed, it's about comfort. Two years later and I can't type any faster than I could before, but typing is a lot more comfortable. The analogy I use is headphones - when you switch from iPod headphones to an audiophile pair, you notice the difference the most when you switch back. When I type Qwerty, I can't help but notice "wow, my hands are moving all over the place".

Edit: I should mention that I accomplish switching by using two-finger hunt-and-peck with Qwerty and touch-typing on Dvorak, which maybe lessens it a bit.

I would also like to agree here: I have been a Dvorak user for over 5 years and don’t find it a problem to “type” QWERTY on my iPhone (I imagine it’s kind of like how we all got good at T9 back in the day), though it is definitely annoying to type QWERTY on a laptop keyboard now (not that I have to often).

This:

> The issue isn't about speed, it's about comfort.

That's an important point. Sure, (I think I read somewhere that) the touch-typing champion uses Dvorak. However, I don't think that I type any faster after 2 years of Dvorak---I just type more effortlessly. Going back to QWERTY feels like a game of Twister.

I type in Dvorak on my keyboard but wouldn't be able to use it on a phone. I have no idea what the Dvorak layout looks like, but I see multiple QWERTY keyboards every day.

It's also optimized for two-handed typing, not screen-tapping, so Dvorak on a phone likely has no improvement over QWERTY. For that you would need something like: http://www.almaden.ibm.com/u/zhai/ATOMIK.htm

I don't have a problem using QWERTY on my iPhone---I think it's because thumb-typing is different than 10-finger typing. I do get frustrated by iPads though (I don't have one for this reason, though the new one is tempting).

I recently found a jailbreak-only dvorak keyboard addon which worked pretty well.

You shouldn't worry about not being able to type qwerty anymore - I use dvorak on my main keyboard, but qwerty when I type directly on my laptop and it works perfectly fine.