My first time reading WoT

I have no idea what they base those estimates on, but I'm troubled that perhaps it's the general low quality of reading comprehension for English readers weighted by the dismal performance of US residents.

Well, I think the calculation works on my over all readings. Although atm I mostly read English, I am way faster in German (of course), but also I usually have some troubles with a new-to-me English author for the first pages (... or books), bc I have to get familiar with their writings and/or wordings... so at the beginning there is a lot more refering to the dicctionaries, glossaries and maps...?