I can count while reading and it's fairly easy

The sentence below will be written when I'm counting to 60

Let me try counting while writing, it's hard with tons of mistakes and typo (like switching count with write), it's also demonstrably slower with this whole sentence taking more that 60 count. Verbalizing the count is way harder and I need frequent stops to gather my thoughts

counting aloud or in mind

the former is harder but still doable

It really does feel like reading and counting can occupy separate lanes, while writing and counting are both trying to use the same internal narrator

Well, FWIW, I can easily write and count. It's actually way easier than I thought and takes no effort. Perhaps due to automatic touch typing while talking and thinking about something else etc? I can actually type and think about something else, never really noticed that before.

Reading and counting is harder for me. I can do it, but it's tiring. Those feel like they share lanes to me.

With touch type it would work if I buffer the work ahead of time and then I can type out the buffer while I count.

Sort of like: I think what I will type then when I start typing I start counting.

I do not generate what I type while I count, but think of it before I do it.

A CPU designer might call them execution ports.