Surely, with a lot of swept wing aircraft, the wing does not give up 100% of its lift at one exact speed but rather it progressively loses lift. This is different to the straight wing case when there is usually an abrupt stall "break" and pitch down.
Hence the aircraft is going downhill and progressively stalling the lower the speed? That is my understanding of why the g used is less than 1g.
Where is John Farley when you need him? !!