I really don't think so, or at least not when you're a "power user". I used T9 when I was a teenager glued to his phone, and was definitely way faster to type t

I really don't think so, or at least not when you're a "power user". I used T9 when I was a teenager glued to his phone, and was definitely way faster to type than I am now with a touchscreen and autocompletion. I was also faster than my friends that did not use T9 but wrote in "txt spk"