http://blogs.scientificamerican.com/basic-space/2011/12/31/faster-than-light-neutrinos-a-timeline/ The explanation I like best is that the Nutrino is so slippery that it is slowed less by stone than other radiation is slowed by atmosphere.
The speed of light is already known to not be absolute, the top speed is affected by the medium the light is traveling through.
But nutrinos are uncharged so to a nutrino the resistance of stone to its passage is slight , as it passes through meatal it does not interact at all untill it makes a direct hit on another particle.
Photons and particles of other types interact with matter as it passes through, being attracted or repelled therefore slowed.
The nutrinos being measured are moving at nearly the best speed of light in a vacuum even though they have passed under mountains.
Every other measureable energy is passing along wires or through atmosphere slowing enough to make the diffrence hard to account for.
