The speed of gravity

What is the speed of gravity?

It's another puzzle about gravity that my theory may help solve. Because my theory says that gravity is the effect of matter set in motion by the Big Bang meeting resistance, the speed of gravity is proportionate to that motion. In general, the greater the mass the faster the speed of its gravity. The smaller the mass, the slower the gravity.

However, I think speed is a misnomer in this regard. Gravity does not move so much as it is an apparent effect. The following example, a modification of a common analogy to general relavity's curvature of spacetime, illustrates:

A baseball rolling on a trampoline equidistance between a small cannonball and a large bowling ball will move towards the dent left by the cannonball if it is removed at the same time as the bowling ball. That's because the apparent gravity (or loss of gravity) of the bowling ball will "reach" the baseball faster than the gravity of the cannonball, even though they are removed simultaneously.

This shows that gravity does not travel at a uniform speed, such as the speed of light. It travels very fast, however, because its effects are continuous. The bowling ball, for example, is continuously affecting the motion of the baseball. When it is removed, the effect appears instantaneous because the dent disappears at virtually the same time.

I think gravity speed will also change with the relative motion of the masses. But whatever the speed or mass of matter, the apparent speed of its gravity will be proportionate.