The fact that there are other (competing?) scientists doing superconductor research suggests there will be organized attempts to verify it.
That said, I remember reading about shockley having ideas about the transistor that he only fessed up to as his other more open collaborators started understanding the phenomenon.
Scientists can move far quicker than you expect, and a positive or negative replication of this superconductor claim should be a very easy publication to grab. It would definitely be worth alloting a few weeks of grad student time to replicating this ASAP to get that publication.