I can touch type on my IPad mini as fast as I touch type on a full computer keyboard, maybe faster. But neither of these speeds approach 100 wpm; at that speed I'd probably want a real keyboard.
But typing on a phone is misery, and I won't do much more than 140 characters that way. Tablet lets me do almost everything. Come to think of it, I don't have a computer at home other than a work-provided one either, though I did set up an old laptop at husband's grad school apartment so I could build my online classes when I'm there (can manage them from the tablet, grading and interacting and etc., but new content creation is still a pain in the ass that way).
However, I also do write scholarly articles with the voice-to-text feature on the tablet and/or my phone. Both Android and iOS do that much better than Windows. For cleanup and citations, it's back to a computer. My world, for now, is hybrid.