Care to elaborate? Link?
Metaresearch site article on actual experiments involving the speed of gravity propagation.
Newton’s theory viewed gravity as instantaneous while Einstein’s theory viewed it as traveling at the speed of light.
I believe in 2003, or thereabouts, it was announced by a physicist here at the University of Missouri (go Tigers!) that the speed of gravity had finally been measured and it was consistent with Einstein’s theory. However, his methodology and conclusions are still controversial.
Okay, I just Googled it. His name is Sergei Kopeiken. Here’s an article you can read that pretty much encompasses the debate:
http://www.space.com/scienceastronomy/gravity_speed_030116.html
And, here is Kopeiken’s rebuttal:
http://xxx.lanl.gov/PS_cache/astro-ph/pdf/0311/0311063v6.pdf
It’s a great read when you have some time.
Cheers