[Symmetry]

The path from the things people observed to "and neutrinos travel faster than light" travels down a long string of inferences. Inferences about the equipment working properly and inferences about other aspects of physical law.

Most likely this is a problem with the equipment. I'm sort of hoping that some other aspect of our knowledge of physics has been revealed to be off, though, since that is where real progress comes from.

It might even be that the most straightforward but most improbable case is right, and these neutrinos actually are traveling faster than light. That would be awesome, but also terrifying since then its only a matter of technology to get a device that would permit communication with the past.