You are basing this off of...what, exactly? Employees vouching for contractors are able to do so along any metric, but given that they are sticking their neck o

You are basing this off of...what, exactly? Employees vouching for contractors are able to do so along any metric, but given that they are sticking their neck out professionally on their behalf, I assume that the criteria they care about the most is the exact criteria that will later be used to determine if the contractor was actually a good egg.