lostacount, kids do apply to many other schools but no matter what they also apply to Bing and/or Stony.
60% of BronxSci kids put an app in at Bing. I am certain same is true for Stuy. Only about 30 kids from BronxSci ended up enrolling last year (700 kids in class). I can understand why Bing is so reluctant to accept these kids. They absolutely destroy yield. It came as a shock to me when my son was rejected from SOM given his scores. But I can see where Bing admissions is caught up in a difficult situation.
It is a shame that NYC and State do not have a better option for their residents particularly given the talent our high schools produce.