I have a hypothesis:
Because G2 players in general have a playstyle that revolves around high levels of teamplay and kill trading, they tend to have much better stats overall than they should as separate individuals.
Add on the fact that they as a team are basically always winning games in region and making deep runs internationally: an argument could be made that their winningness means that despite single player inconsistencies between maps, the average performance of the team system results in high ratings for all players when looked at comprehensively.
It is possible that while G2 has very solid players, if you isolated them from their team system they would experience a larger statistical drop than other players.
evidence: they made n0t, t0x, and s0y0pl0y0r look like good players






