Aside from the whole ‘hand size‘ discussion, I don’t even hardly type, I use dictation for Siri for about 90% of my text/workflow. Now, Siri isn’t always accurate and I do have to semi-proofread before I post, but it’s so much quicker than typing and Siri has improved with deciphering with the fluency of dictation over the last three years. [And this is coming from somebody who uses Siri every single day for dictation of reports, email/any form of communication.]
It’s a crucial piece to my daily activity, and I think some major advancements with Siri will be here in the next year or so with machine learning/AI improvement with John Giannandrea acquired from Google.