Noah learnt a bit from those pages. He learnt the ranks of the body, which were simply grouped into, the glass stage, the stone stage and the metal stage.
He also learnt a disappointing truth about his current state.
Apparently the rank 1 speed essence was the lowest rank which were for beginners.
If he listened to the writers words, he normally should have access to rank 3 speed essence, which could put him directly on par with peak stage tier 3's or lower stage tier 4's, while still in the lower stage of tier 3.
It seemed the writer knew he would face this issue, and reassured him that he could catch up, but that was by letting the speed essence transform his body completely, and that could only happen after a lot of cultivation.
When the rank 2 essence stopped improving his body, he had crossed the threshold, and would be able to use the essence meant for his body.