Lets be clear here, the people who ran published this test are also skeptical about this. However they did everything possible to reduce and remove errors from their calculations. This means one of two things, either our present understanding of physics is incorrect, or our present understanding of experimental physics and the ways errors creep into our experiments is incomplete. The scientists who did this test suspect the latter, however they've done everything they know to remove mistakes. Much like when we are troubleshooting why our computer won't start we don't jump to the CPU is dead, they also don't just jump to the big conclusion. It's still neat though because we'll still learn something meaningful, and you never know it really could open new understanding of reality.