oops, I corrected a spelling error in my previous and it bumped my post down.
Everything you say is true with the exception of the demographics, you cannot use driveby analysis but you can use school API info taken from the state website to get a decent look at the demographics.
Great Oak High, the South Temecula high school numbers of 1844 students.
African American (not of Hispanic origin) 94
American Indian or Alaska Native 35
Asian 69
Filipino 110
Hispanic or Latino 323
Pacific Islander 16
White (not of Hispanic origin) 1127
Socioeconomically Disadvantaged 114
English Learners 80
While there are many races represented, the demographics are similar to S.D.’s best schools and while it is predominately white, they key stat is the low socioeconomic disadvantaged numbers similar to the the Poway district numbers. But white people lose their houses too so I have no argument that R/E will decline here but it is for reasons other than race.
You can get stats and performance for any school in the state here. An API of 800 or more is excellent and 650 sucks if you are keeping score at home.