If you believe this is true, the most impressive part of the story might be the fact that they were able to synchronize two events that occur 450 miles apart to within 10ns. For perspective, light travels over that distance in about a 400th of a second, that margin of error is a 100 millionth of a second. So the discrepancy between when the particle left and when it was measured to leave, the discrepancy between when it arrived at the destination and when that was measured as well as the variation between the clocks at the source and destination combined add up to about 1/250,000 of the amount of time it takes light to travel between those two places.
In terms of measuring the speed of sub-atomic aprticles, and the speeds at which they've been able to actually
slow photons down, those are rather large descrepencies.
I think some people may react to these new findings as almost sacrilege to suggest that Einstein's Theory of Relativity is at all fallable, when he himself was one of the first so put forth that it was
only theory, confined to the limits of mankind's knowledge at present, and subject to further alteration or even invalidation, as man's understanding of the forces of nature and the universe expand.
No matter how much we pat ourselves on the back (as a species) for our ingenuity and understanding of the universe, the universe will continue to keep us (as a species) humble, by relentlessly demonstrating just how little we really know, and how much more there is to discover.
That. to me, is what makes science and exploration so exciting, and what will keep we humans always striving for more. Very cool stuff, Roy ... thanks for posting.