peoples' high school matters more than college.

A guy went to a math magnet high school, But only go to duke for college  that cs is not famous , He is fantastic engineer ;

people who went to state university for cs but went to a good high school in bay area. fantastic engineer

People from a competitive magnet program in science /math/cs are extremely good no matter where he went for college 

people went to MIT, but from a so so high school at Arkansas, very bad engineer