Maybe the flight path of the neutrinos in space-time isn’t ‘bent’ the same way by gravitation as photons, and is therefore ‘shorter’?
(Whatever the h3ll that means...)
There is something called "quantum tunneling" where subatomic particles at least appear to pass through a 'barrier' faster than light speed. I have no idea if it plays a role here.
"Quantum Tunneling is an evanescent wave coupling effect that occurs in quantum mechanics. The correct wavelength combined with the proper tunneling barrier makes it possible to pass signals faster than light, backwards in time."
“Quantum tunnelling is in the domain of quantum mechanics, the study of what happens at the quantum scale. This process cannot be directly perceived, so much of its understanding is shaped by the macroscopic world, which classical mechanics can adequately explain. Particles in that realm are understood to travel between potential barriers as a ball rolls over a hill; if the ball does not have enough energy to surmount the hill, it comes back down. The two forms of mechanics differ in their treatment of this scenario. Classical mechanics predicts that particles that do not have enough energy to classically surmount a barrier will not be able to reach the other side. In quantum mechanics, these particles can, with a very small probability, tunnel to the other side, thus crossing the barrier.
The reason for this difference comes from the treatment of matter in quantum mechanics as having properties of waves and particles. One interpretation of this duality involves the Heisenberg uncertainty principle, which defines a limit on how precisely the position and the momentum of a particle can be known at the same time.[13] This implies that there are no solutions with a probability of exactly zero (or one), though said solution may approach infinity. Hence, the probability of a given particle’s existence on the opposite side of an intervening barrier is non-zero, and such particles will appear—with no indication of physically transiting the barrier—on the ‘other’ (a semantically difficult word in this instance) side with a frequency proportional to this probability.”
http://en.wikipedia.org/wiki/Quantum_tunnelling