She got thin letters. (UChicago sends a very nice DHL box.

)
They also forgot that UChicago only has a graduate business school, and no self-respecting MBA student - with the prerequisite 8 years of working experience - would go "MOOOOOMMM I'M GOING TO SINGAPORE!!"
That said, I suspect much of the backlash can be attributed to the asinine claim of cute guys in NUS - no offense of course. I can hardly imagine the majority of aspiring NUS students batting an eyelid at Sloan, Wharton or UChicago. After all, Wharton was an unknown quantity until the arrival of SMU.