Just had a battle where I totally outplayed guy in 279 (e), in my E100, without "gold ammo". It was tier IX battle on Empires border. Also dont mind my nickname, during the years I renamed X, Y times, to various fictional characters because thats just what I do IDK..
This guy has 51,47 % winrate, and in general pretty solid stats on like tiers 5-8. Also, because I believe average WR isnt even 50 %, I would consider this guy like slighty above average.
But.. I checked his stats on tier X, and he had like 1K-1500 DPG on all of this tier X tanks. He also had similar stats on his tier IX tanks.
I could be mistaken ofc, but excuse me if I dont believe that this guy, finished 279 missions by himself.
Source: https://www.reddit.com/r/WorldofTanks/comments/uuug8p/boosting_is_real/
