H/S/W is very subjective and hard to predict. It depends on so many factors including the GMAT score.
It breaks down as follows:
There is the very strong applicant group -- like those who went to top under grad schools, worked for top companies and have overall solid credentials. Also include US Army, Peace Corp, Dual Degree -- P.h.D, MD, JD, MS degree holders and in general high achievers.
Those who are on the cusp -- these applicants have one or two real strengths but they also have one or two weaknesses. Usually a majority of the applicants fall into this category. They might have great work experience -- but might have weak academic credentials. Or they might have a great gpa (but from a smaller or less competitive school or from a relatively less rigorous major). A good essay and personal interview can make the difference here.
Under represented Minorities -- There are not a lot of blacks and latinos (especially women) in b-schools. If you are an under represented minority -- your chances of getting admitted are a bit higher.
High volume applicant groups -- Indian IT engineers are known to apply in large numbers. There are also a lot of applicants from China and Korea. If you belong to these groups -- your chance of getting in is lower than average because of the high competition among the sub-groups.
It depends on which category you belong to. If you have stellar overall credentials -- a 710 is certainly not going to keep you out of H/S/W. It's a solid score worthy of the big 3!
On the other hand -- if you are a "on-the-cusp" candidate -- then you might have to work extra hard on the essays (Wharton places extra emphasis on the quant score -- their curriculum / program is significantly quant heavy).
If you are an Indian / Chinese Engineer -- then your chances are not very bright (unless you have done some extraordinary things at work or with your life). GMAT score is a significant factor for Internationals -- it's the easiest way to place them all on a level playing field.