I didn’t bother reading all the other posts because there were so many so I apologize if I’m repeating anything! 
My son also went into college as a CS major - he also had a very high SAT (2300) and was applying to the top schools. Because he was a white male, he received a lot of “no’s” from some of the best - CMU, Yale, Princeton, Brown, Cornell - I could go on all day. Because the boy that you’re speaking of is looking to go into a math/science based career, and because he is a white male, he should most definitely be applying to many other schools, even if they think they’re low matches (which they’re not). It’s VERY difficult to get into any of the top schools for any major, but particularly difficult if you’re a white male going into the math/sciences. I don’t care WHAT his GPA or SAT is.
And just as an aside, my son ended up changing his major when he realized CS was not for him. So you never know.