I didn't see Nikon users having half this much trouble back say 2004 admitting that their sensors didn't match Canon sensors and back then they didn't match them in any way, not for low ISO, not for high ISO, neither DR nor SNR and sometimes not even for MP either.
Actually, I remember some people saying "who needs Full Frame!" among other things back in the day. I don't have the statistics to decide which camp is more hung up on their respective brand nor do I care. People will always try to defend their purchases. It's part of their nature.
That said, I don't see where is the big deal in telling the story as it is. You can't always win if life
I think it was Nikon who were saying who needs FF right before they snuck their FF up on Canon.
I do recall running into a Getty shooter decrying how bad the Nikon sensors were and envying Canon and talking about switching.