“Hello from the other side…” Here’s some data for y’all from the land of the (gasp!) 1200s. 
NC, 1290, 96% Nat. Rep. Sample, 94% PSAT User, 199 SI
R+W 700, 99% (Both Samples)
Math 590 (Ouch!), 88% Nat. Rep Sample, 86% PSAT User
I don’t know if these figures will help you mathy folks figure anything out or not. I am an English major, and numbers are not my friend, a trait I apparently passed on to DS based on the above! Figured I’d share just in case.
FWIW: I am extremely proud of him and in no way do I feel his life is over because he will not qualify for NM. Deep breaths and perspective, my dears. You all have so many options these days, whether you make the cut-off or not. You are obviously brilliant children who will be FINE and have glorious, successful futures. (Sorry, I think my maternal instincts kicked in there. I want to make you all soup and read you a story or something. :D)