I agree that tactile feedback is an advantage to physical typing. I'm not ignoring that aspect when I say that virtual keyboard typing is fine. Virtual keyboard typing is not as fast as physical keyboard typing. I type 80 WPM on a physical keyboard and 50 WPM on my iPad. It's slower... but fine.

My response to taude still stands. If you constantly need to concentrate on the act of typing then you need to train your muscle memory.