Sure it means two things:
1. Schools try to balance out their classes in terms of industry, country of origin, gender, etc. diversity is important. Given the very large amount of Indian applicants, and the plethora of choice the schools have, it tends to make the application harder than say if you were coming from Mexico, or Russia, from where relatively few candidates apply.
2. Indian applicants tend to have AWESOME GMATS, higher than the mean. Which means, you should have a bit higher than others.
Hope this clarifies things.
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