first maybe I should start with... is the quote from this site accurate? (quote follows link)
"The same dilemma comes up in many guises: Why do photons from the Sun travel in directions that are not parallel to the direction of Earth’s gravitational acceleration toward the Sun? Why do total eclipses of the Sun by the Moon reach maximum eclipse about 40 seconds before the Sun and Moon’s gravitational forces align?"
If the described events do happen and indicate a faster than light speed for gravitational acceleration...
Second; the area of a containing mass is not mentioned (density of a thing), so if a mass equivalent to earth was felt at the distance of the moon, but instead of being in 1.08e+12 km^3(what it is) was actually in 2.38e+17 km^3 (radius of distance to moon) wouldn't that be the same acceleration? ( earth's density 5.51 g/cm³ or 5.51e+12 kg/km^3; atmosphere density at sea level 1.225e+9 kg/km^3; ... which is only 1000 different so the resulting volume would be very roughly another 100 less dense than air )
So if a very distant star explodes, other than the small amount of matter converted to energy, isn't the overall mass of that area going to be the same effect? So why would they presume that LISA could measure such events as gravitational waves? http://lisa.nasa.gov/ (LISA) or LIGO https://en.wikipedia.org/wiki/LIGO