Readings took a hit between levels 10 and 17 or so, but have started to feel more predictable since then.
I also started with about a thousand words that I knew in terms of listening comprehension (but almost no kanji), so those have helped speed things along, but I’m running into fewer and fewer of them with each passing level, so time will tell how well these numbers hold up.
For those reading this thread who are seeing numbers that look way higher than yours and wondering how it’s possible, many of us are running a userscript that adds an “ignore answer” button, which lets us deal with typos or “gah, 大きい, not 大きさ!” mistakes.