There are some perfectly valid assumptions being made here. First, these numbers are likely through Jan 4th, as with Sony's last report. Second, AMD's reported numbers are definitely ball park accurate so it doesn't make sense to consider these numbers with some significant error.
For the sake of giving VGC and XOne the benefit of the doubt, let's say the number is 30m. We know the PS4 sold through 18.5m, so shipped number might be 19.5m (this seems likely as Sony would have probably prefered to report a 20m figure if it had reached it in sold or shipped). Assuming same shipped/sold gap for XOne then we get 9.5m sold through. Even a significant error would give XOne 10m max sold through (going by speculation of AMD's number), but this would put combined shipments minus sold though at less than one million, which is unlikely.
e=mc^2
Gaming on: PS4 Pro, Switch, SNES Mini, Wii U, PC (i5-7400, GTX 1060)
