I can also count while reading, I just tried it. But I can't write while counting.
I can have one interpretation and one generative task running at the same time.
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
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