[xvector]

The probability of being able to reproduce this is unknown, there's no reason it couldn't be one in millions.

If the original sample breaks in transit or experimentation we may have lost the only example of a room temp superconductor ever seen.

[WillPostForFood]

Invite some scientists and journalists to the lab to observe it?

[WindyLakeReturn]

I think they have done that. The catch is that these scientists are likely to take their time, because they want to produce something with weight behind it. This isn't lab #5234's attempt to reproduce it which showed some weird behavior that might be a success, this is the expert report on the original material giving second opinion on how valid the first's claim is. That needs to have more care, which means more thoroughness doing the research and more time spent writing up the final result with care. If lab #5234's attempt ends up being a false positive or experimental error, it will be one of many and won't mean much, but if this particular report is wrong or has a major error, that is going to be impactful in a negative way.