shepherdless, the basic premise that the OP makes in the linked article, is, that the speed of light in a vacuum is indeed ~ 300 000/sec, unaffected by one's own speed, but that the early universe was anything but a void. ( some Helium is believed to have originated that early). For example the energy carried by photons out of the active core of the Sun is estimated to be 20 000 years old, because going through the dense plasma, but took only ~ 500 seconds to reach us from the "surface". By the time stars appeared in the early universe, the path was clear for light to reach it's "in vacuum"speed . and surely those working in the sciences that deal with the developing universe have factored all this into their models., like the epoch of inflation.
Trying to prove the bible to be right by asserting science is wrong, puts Perry's proposition in peril.