Uh no, I'm pretty confident they are just saying that whatever the Tc is, it's at least 127°C. I don't think they're redefining Tc to mean that it superconducts

Uh no, I'm pretty confident they are just saying that whatever the Tc is, it's at least 127°C. I don't think they're redefining Tc to mean that it superconducts above that temperature. That would be... interesting. "You can't run across this bridge without falling? Here, I'll have an elephant bounce up and down on one end, that'll make it easier!"