I have heard that the speed of gravity is the same as the speed of light, is this true and if not, what is the speed of

Question: I have heard that the speed of gravity is the same as the speed of light, is this true and if not, what is the speed of gravity?
- Keywords:
  gravity,
  light,
  properties
Asked by Chad to David on 13 Nov 2014.
- David Wilson answered on 13 Nov 2014:
  
  Gravity doesn’t really have a speed, it accelerates you toward the ground-adding to your speed. How much it accelerates depends on the mass of the object: For the Earth the acceleration is about 9.1 meters per second per second. On the Moon, which has much less mass, the acceleration is about one sixth that of the Earth.

Question: I have heard that the speed of gravity is the same as the speed of light, is this true and if not, what is the speed of gravity?