In order to camouflage the falsehood of Einstein's 1905 light
postulate

http://www.fourmilab.ch/etexts/einstein/specrel/www/
"...light is always propagated in empty space with a definite velocity
c which is independent of the state of motion of the emitting body"

Einsteinians would advance any idiocy, even some silly version of the
forbidden aether theory:

http://www.astronomy.com/asy/default.aspx?c=a&id=3314
"Finding evidence that the speed of light varies slightly in different
directions - proof of broken Lorentz symmetry - would radically revise
scientists' notions of the universe. It would mean that space (or more
properly, relativity's four-dimensional space-time) has a kind of
texture - a preferred orientation."

Pentcho Valev