woggy987
lol, I think this depends on the school, and how much you improve.
I don't think a 20-30 pt increase will be worth trying this. they will most likely tell you no.
I agree. I think that while for most schools GMAT is an important part of the application and once you get past their threshold (which you have in being accepted) marginal increases don't really matter for admission, let alone for scholarships.
A 20 to 30 point increase is pretty small and frankly is within the margin of error of a test (it could be the result of guessing right a on a few multiple choice questions). That, coupled with the fact that scholarships are rarely if every awarded based solely on GMAT score (although it may be part of the equation), I'm not sure a small increase would increase your award.
While asking likely won't hurt, it will likely waist both your and the Adcom's time. I'm also wondering why you took the GMAT after being admitted, unless you were applying to other programs. Frankly having Admits in hand at other schools (especially with $$$) is better leverage for negotiation.