You would definitely have a better shot at the part time program, but you must realize that your GMAT could litterally be getting your application tossed out. Applying to those programs (some of the best in the world) with a 630 GMAT is definitely a huge challenge. Most likely you would have to bring something extremely special somewhere else in your application, including but not limited to: underrepresented minority, veteran, incredible story of hardship, sex, age, work experience. If you are a normal applicant, your 630 could litterally keep them from reading your application. I don't mean to sound harsh, but there are dozens if not hundreds of applicants that get rejected every year from top schools with GMAT scores of 750+. There application just wasn't strong enough. With a 630, you are outside of the 80% range (on the bottom side) for both schools you applied to (part and full time), which puts you in a very challenging spot to begin with. Look a these pages:
calling-all-nyu-stern-fall-2012-applicants-116635.htmlcalling-all-2012-columbia-gsb-applicants-113136.htmlYou'll see on the distribution graph of GMAT and GPA, there are very few people that even applied with less than a 650. There isn't one person on GMAT club that was accepted (yet) to either of those schools with a GMAT less than 680. I would recommend that you spend all your time, money, and resouces improving your GMAT, taking a GMAT course, or buying GMAT material first before you hire any consultant to help you get into your schools. Your GMAT is the limiting factor right now. Although you have a better shot at both of those part time programs, your GMAT is still going to be a significant weakness in your application. You would drastically improve your situation if you were able to improve your score by 50 points, or even get up to 700. That being said, if you are an extremely special applicant in other areas, maybe you are the exception to the rule.
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