That could be, but I'm not posting Aruanan's argument. Rather I'm posting my own (which happens to dovetail nicely with Newton's points on the matter).
And my own argument is that we KNOW for a scientific FACT that our Solar System is traveling through space. This fact means that our Sun is moving even though it APPEARS to be in the same place to an Earth-based observer.
Since the Sun is ACTUALLY moving, the 8.3 minute-old Light that we see from the Sun is actually always coming from the Sun's previous location. Thus, we "see" the Sun where it was located 8.3 minutes ago (i.e. the time it takes Light to travel from the Sun to the Earth) rather than where the Sun is ACTUALLY located.
My argument is further that if Gravity travels at the same speed as Light, that the orbits of the planets around the Sun will see that same 8.3 minute delay (which would give us a Solar System in which the orbits of the planets progressively "lagged" behind the actual movement of the Sun).
Yet since we see no "lag" in the orbits of the planets, we have to conclude that Gravity doesn't travel at the slower speed of Light, but rather that Gravity travels SUBSTANTIALLY faster than Light.
And this conclusion is verifiable by direct scientific observation. QED.