The fact is, is that the Supreme court in only 1 case directly discussed NBC as it pertains to presidential qualifications and that is Perkins v Elg (1939) wherein they stated that a child born to naturalized parents and after the parents naturalization was eligible for president. But as with the other cases that mentioned NBC, it was merely dictum other than in the Elg case, the SCOTUS upheld the lower court ruling that she was a NBC because her parents were naturalized prior to her birth, therefore they ordered the State Dept to issue her a US passport as she had met all the other requirements of applying to reestablish her US citizenship prior to her 21st birthday.
Is as much a citizen as a natural born citizen means equal in rights but not the same path to citizenship and that was the ruling in WKA.