I don't necessarily agree with the findings, but you may have missed something. The article talks about typing vs writing. This person talked about listening instead, and that does work for some people.

Let me give you an example where the study can be wrong. My son is an Aspergers. He is classified as gifted or near gifted (it's a fine line). However, he struggles to write. So, in his case, he has 2 options: (1) just listen [he has a great memory and this has proven to work well], or (2) type.

I take these types of advice with a grain of salt. Rather than the what, I focus on the why.

My own experiences reflect those of many commenters here: I wrote notes and either couldn't read them or didn't go back to them. I most probably should have listened rather than scribe myself.