FTA: "Evan Zalys-Geller, a condensed matter physicist at the Massachusetts Institute of Technology in Cambridge, says that the resistance measurement wasn’t sensitive enough to distinguish between a zero resistance superconductor or a low-resistance metal like copper."

I have little knowledge of the field, but as an EE, I would have thought that making sure that you are actually able to measure the effect you are trying to prove would be step zero in an experimental setup, no?