I just mean that you should not think about average GMAT numbers very much. each situation is unique and considered by adcoms separately.
For example, if you had 9 years of WE your GMAT is not so important. But if you had bad GRA - it becomes much more important. If you are working as an engeener you are expected to have higher than average score, but if you have fine art degree - lower than average is acceptable. if you are a woman (they have in average 30 points less scores) and non-english country resident you are not expected the same score as american man (despite non-english Chinises have the best average gmat results in the world). So the every case is individual and everyone has the optimal "expected" score which may be much higher or lower than average. and the task - get this optimal result, becouse the result which is higher than your profile candidate expected to have really do not give you a lot of additional points. it's my view on this issue.