Dear Scientific Types: Question about the propagation of gravity

[anarch]

I apologize if this has been beaten to death in here already...

I'm just curious as to what the consensus is on whether gravity propagates instantaneously, or whether the force of gravity is subject to the "universal speed limit" of c that applies to electromagnetic phenomena.

On the one hand we have the Kopeiken/Fomolont experiment of a couple years ago described here:

http://physics.about.com/cs/gravity/a/speedofgravity.htm

This purports to measure the speed of gravity, but then confuses me by bringing gravity waves into the discussion. I don't think that's quite the same thing, and I don't think there was ever any controversy as to the speed of gravity waves (if they can carry information, they cannot travel faster than light). And anyway, it comes up with a value of 1.06*c, or 6% faster than the usual speed of light in a vacuum...with a margin of error of 20%.

On the other hand, quite a few reasonable-sounding people have said that this experiment measured not the "speed of gravity", but the speed of light...which, not surprisingly, comes in right around c with the margin of error.

So...yeah, anybody want to help me out here? Feel free to explain it as you might to a child. I apologize in advance for my general ignorance.