>>11489637>Gravity waves can occur not because space is quantized, but because everything that floats in it is.no, that's wrong. gravitational waves come out of general relativity which is a perfectly classical (non-quantum) theory
>The greatest mystery in physics is thus why light travels as fast in a vacuum as gravity waves traverse through space.no, that's not a mystery. according to Lorentz symmetry, there is only one invariant speed, i.e. c = the speed of light. and GR says that gravitational waves must also move at the only possible invariant speed, i.e. c
>Do we have any way to experimentally verify the propagation rate of gravity waves yet?yes, with LIGO, when it sees a merger of say two neutron stars (which it has) they can point normal telescopes in the direction of the merger and pick up the normal light/radio/x-ray/electromagnetic signals from the merger and they arrive at the ~same time. so the gravity waves are moving the same speed as the normal EM waves.
