During my contemplation of gravity, I recently came across the Experiment performed on Sept 8 2002 using the VLBA to measure the speed of the lensing effect caused by Jupiters gravitational influence upon a quasar stream. The accuracy achieved by using the VLBA was immensly impressive, and they came to the result that gravity has a speed of 1.06 the speed of c, with a + or - of 0.21. Now this result is exactly what i would have expected them to discover, i have no qualms about their results. Where I'm confused, is as to why the experiment was performed in the first place. For surely, if an object of mass is limited to the speed of light as its maximum velocity, Then it would not matter how fast gravity/gravaton moves. Even if the gravity could cause its influence at at infinate velocity, it still could never move the quasars faster than the speed quasars themselves are limited to : i.e. the speed of c. Is there some obsqure piece of logic or information that I've missed, regarding this experiment? If anyone could shed some light on this matter for me, it would be much apreciated, because at the moment it appears to me to prove nothing except that we can measure things very accurately.