Yep! Understood, so how were the neutrinos and light detected from the SN at the same time?
Even if both escaped the gravity well etc at exactly the same time the neutrinos should arrive at 60ns X time/distance involved.
This is IMO impossible as the observer would have to know the exact second that the first burst of neutrinos were due to arrive. As this clearly isn't possible we are back to my analagy of the two trains actually passing you, in other words the first observed sign would have been the visible flare of the SN explosion, obsevations of the neutrinos would then logically follow once the visible flare was observed.
This would make the speed differences difficult to measure, firstly the observers would need a reason for the measurement, unlikely as they wouldn't be expecting any difference, as per General Theory, and the equipment to hand.
I don't know of any optical observatory with neutrino detectors on site, are there any?
Hence my not 'getting it!'
Roy.