They start at page 132 on the WoWS numbers 9th season rankings and end on page 238. Not being able to download all pages and not wanting to wait for someone to do it for me, I manually copy-pasted page 132, 142 … 232 and 238 to EXCEL to see how they did. I put the players into 5 groups by increasing winrate and compared them to the 10 groups created for the 1-5 ranked players when doing the star saver mythbusting:
It is clear that the top ranked players played more than those who got stuck at rank 10. But it’s also visible that the worst 20% of rank 10 players played more than the best 20% of rank 1-5 players, so there is a significant group of “hardcore baddies” in low rank and a significant group of skilled players who could rank out with limited playtime.
So there is no clear outcome on the positive side of the theory. You clearly need to be the best of the best to rank out with 20-30 hours of playing, the norm is 50-60 hours. However playing 10 hours a week is far from being excessive even for a family person.
The negative side (people with low ranks are just casuals) on the other hand is decisively defeated by the huge battle count difference between the groups. There are players who spend 5x more time till rank 10 than others. Please note that the data is itself skewed. It doesn’t contain those who passed rank 10, just those who are finished there. So we don’t see those who had 60%+ winrate until 10 and kept going, just those who stopped for some reason.
More detailed statistics could be made if someone would be so good in making scripts to download all 9th season pages and create an excel with the columns “name”, “battles”, “winrate”, “rank”, “average XP” and “average frags”, now that the season is over and the data is final.