Contrary to popular belief, American business schools do not look extensively at the GMAT in determining entry. Wharton looks for a 'minimum level' of >80% for both verbal and math to show that you have the academic aptitude to handle the (not-unintensive!) courseload. After achieving that (700 and 710 probably falls right within this), your time is much better spent on your essays, talking to recommenders, or other aspects of the application. (P.S.: similarly TOEFL- they just want to see you can handle studying in an intensively English environment).
Hope you guys found the Beijing info-session useful!