I am trying to find official explanation on how the crew is supposed to work with premium tanks (what I sad above is based on how my friend explained it to me briefly, mind you a very experienced friend).
But in the meantime I found this interesting piece of info. People on Russian server analized win ratio of 1000 players with the largest numbers of games played and came up with the following table.
The first number is your win ratio. The second number is “you are better than this per cent of random players”.
49,2% : 53,98%
49,6% : 57,93%
49,9% : 61,79%
50,3% : 65,54%
50,6% : 69,15%
50,9% : 72,57%
51,3% : 75,80%
51,6% : 78,81%
52,0% : 81,59%
52,3% : 84,13%
52,6% : 86,43%
53,0% : 88,49%
53,3% : 90,32%
53,6% : 91,92%
54,0% : 93,32%
54,3% : 94,52%
54,7% : 95,54%
55,0% : 96,41%
55,3% : 97,13%
55,7% : 97,72%
56,0% : 98,21%
56,4% : 98,61%
56,7% : 98,93%
57,0% : 99,18%
57,4% : 99,38%
57,7% : 99,53%
58,1% : 99,65%
58,4% : 99,74%
So roughly 54% of players have their win ratio less than 49% and only 0.5% have it more than 57.7%.