I have no idea what you are talking about ...
Yesterday I played 4 2v2s (with a bronze lvl player, I'm a silver lvl player) and won 3 of them, although we were rushed in every single game. My partner was crushed in every game and I single handedly won 3 of them, because I go for economy builds and hence I am far far far stronger than rushing players in mid game.
It's good that rush plays are possible, but in no way they are too strong in SC2, they are just easier to execute for very low lvl players, because to build an economy you need quite a bit apm (mine is at ~50-55apm per game, which is still pretty low, but with 30-40apm there is pretty much no way to handle an econ build).







