Strait et al. (NIST, 2019) measured the photon-drag effect in gold films in vacuum and found that 7 out of 8 experimental configurations yield a photovoltage antiparallel to the in-plane photon momentum p∥ — the opposite sign to the Drude prediction and a discrepancy of factor ~33 in magnitude. The authors conclude that the physical processes responsible for light-metal momentum transduction must be "reimagined." We provide that reimagination within the Structured Vacuum Theory TVS23, in which light propagation is a torsional wave in the 23-channel dodecahedral vacuum network V₂₃ rather than a stream of momentum-carrying photons. We show that:(1) The inverted sign follows necessarily from the torsional nature of electromagnetic coupling in the 19 transverse channels(2) The measured transduction factor ξᵐᵉᵃˢ ≈ 1–4 GV/(N·s) is consistent with the TVS23 torsional estimate ξₜᵥₛ ~ 0.46 GV/(N·s) from first principles, within a factor of 2–9(3) The ratio ξᵖ'ᵍˡᵃˢˢ/ξˢ'ᶠʳᵉᵉ = 3.69 ≈ 23/6 is predicted by the 23-channel structure combined with 6 spatial directions(4) The environment-dependence of the p-wave signal in air arises from molecular adsorbates exciting the 4 gravitational channels, which do not invert the sign, producing a competing parallel current All derivations use zero free parameters. This work demonstrates that the NIST photon-drag anomaly is a direct experimental confirmation of the torsional network structure of the quantum vacuum predicted by TVS23.