U can get carried in IB just as easily as the raid. Unless you are going up against a 6 man fire team you only need 2 or 3 decent players to win a game, and in all honesty you only need to win 1 out of every 6 matches to progress in that event. There is no such thing as a fake level 30 you are either a 30 or you are not, and if you are that does not necessarily make you good, it just makes you lucky or dedicated to the game. I have seen 29s in the raid pull more weight in the hard raid than some 30s because the person behind the controller is better at the game, just as I have seen level 8 or 9 players wreck in crucible.