That is, they are biased towards top performers, not just high performers, even if one student's "merely high" is formally higher than the ceiling the other student hit.
(The "winning" strategy then is to move to an underserved high school after an elite middle school, and hit the ceiling.)
This is the new meta, in SF at least.
Despite the "what are secondary effects?" school admins trying to "fix inequality" by creating school lotteries, ending gifted programs and focusing on "equality of outcomes not equality of opportunity", the only thing that has actually improved troubled schools is that smart kids with involved parents now actively seek out lower rated schools like Mission High so they can more easily rise to the top of the class and get a free ride to Berkeley or another UC.
There was an article about this exact phenomenon in SFGate a year or two ago so it is definitely a real trend.
One of the charts in TFA shows a discontinuity in admissions rate around 75% UPP. This means that if you send your kid to a HS that is underserved when you enroll, but drops below the critical 75% threshold because too many other families are doing the same, then the school could fall out of the strong-benefit category.
The kid would still have a better chance than if he applied from a high-performing school, but it wouldn't be as much of an advantage.
Socially, I'm guessing the kid could face some challenges because (1) other high performing students might not like him because he's a curve-breaker, (2) teachers would know what the family was up to and could view it as distasteful, and (3) if the student went to UCSD or another school where this is a well-known hack, there could be stigma for having gamed the system/being less-smart.
Once upon a time, the SAT an IQ test, and it was a real achievement to score a 1600. That achievement has been hollowed out in tandem with the value of most college degrees.
We know how to test for merit. The greatest tragedy in this college admissions racket isn't the shadowy affirmative action policies, the mountains of student loan debt, or the entire college admission-industrial complex that's sprung up.
It's that even the tools we've used to use to measure if someone was _ready_ for college have been annihilated.
You may be joking, but I have several high achieving peers whose families did this with good results. The choice was: did they want to be in the best high school with the highest level of competition, or did they want to go to an OK school that had good magnet programs and less competition. my sample size is only about three, but it worked out well for them.