She is a whining because Whites (and Asians .. but we won't mention that) actually do homework and prep before taking the exams and makes it out like it is cheating. Families are actually using strategy!!! God forbid.
The article didn't even try to explain this but actual gifted education programs don't look at your SAT scores or your third grade report card. What they should be doing is looking at scores from WISC (or WPPSI for younger students), Stanford-Binet or something similar. These are basically IQ tests which cover a variety of cognitive functions, but they must be given individually and can take several hours to administer and analyze. While it is possible to "cram" for an intelligence test, and it can skew the final results, it is difficult to cheat your way to a higher score. As the test is given one-on-one, a competent examiner should be able to spot that anyway.
From what I can tell most US school boards prefer to use CogAT, which is a simpler and cheaper test which can be given to an entire class at once and then automatically graded by feeding the answer sheets into a Roomba. Okay, I made up that last part but it's a multiple choice test, with all of the budgetary benefits that entails. There are a number ethically questionable test-prep services who will happily slip you a copy of the latest CogAT in exchange for a few portraits of Andrew Jackson so yes, it is comparatively easy to cheat at this test if you have the connections to know what is coming up and the cash to buy the answers. Poorer or more naive students, who may actually believe that this is a test of cognitive abilities or that admission into a "gifted" program is based only on ability, would be left behind.