Her observations with output transformers and measurements vs sound, is similar to Bob's teachings. This relates to the 275 design running the smaller output transformers at higher voltage potential. They don't measure as well into a test bench resistor, but they sure make beautiful music with speakers.
The anomaly she speaks of in bench testing with the smaller, worse testing, better sounding transformer, does not show up in loudspeaker testing per application.
Bob views the output transformers as the interface between the tubes and speakers, when determining what sounds best as the 1st priority of the design.
These are topics related to how the lightweight 19lb 275 sounds so good in spite of criticism from some who are not amplifier designers.
Great designers always prioritize audio sonic performance above all else. Designing to measure well is relatively easy.
Going down rabbit holes chasing analyzer numbers and assembling a ranking of audio performance based on SINAD, as if offering a better audio experience or sonic value for the customer, is either ignorance or deception by one measurement reviewer that comes to mind. "Arrogance is a sign of ignorance", so there you go..
"Designing an amplifier to sound the best and designing to measure the best, are not necessarily the same goal." Bob Carver.
Thank you to EveAnna Manely for sharing the experience and maintaining focus on what sounds best, as the 1st priority for her company.