I think you and the parent are arguing the same thing... you're just coming to a different conclusion (whether this means that thinking rate is fixed or not.)

> You can argue that your thinking rate hasn't changed, you've just internalized some concepts and no longer have to actively think about them, but that seems like a disingenuous argument.

So the number of "chunks" may be fixed, but you are able to absorb and think about the text quicker.