I hope that you will allow for me to disagree with you. As a vet of WWII and a brother who died in the battle for Okinawa, I see our birth situations much like Rubio’s situation. Our parents were established residents of the USA. However, neither parent being of a foreign nation had become a citizen of the USA at the time of our births. I have after much learning about this ‘natural born citizen’ matter accepted that neither I or my brother can/should be classified as a USA ‘natural born citizen’. This is based on historical records of the Founding Fathers intent and use in the Constitution and actual later court decisions. I am a firm believer that parent’s citizenship together with USA birth must be an inviolate requirement for POTUSA. This being said that even though as a third grader I once told a teacher my ambition was to be POTUSA.
If, at the time of your and your brother’s births, your parents had allegiance to their home country of origin, then, yes, you would not be considered NBC’s. If, however, your parents had accepted allegiance to the U.S. prior to your births, then, you would be considered, at the time of your births, NBC’s. This is based upon the research I have done on this matter. Admittedly, there is much room for different opinions as neither the Constitution, nor case law, adequately address these details.