Since the one being described is a Japanese poster, it probably is not correct to call it 'minty white' as that designation seems to only apply to US stuff on heavier stock, such as inserts, lobby cards and half sheets.
I believe Crowzilla was using it as a generic term meaning fake or undisclosed reproduction. Even there, the questions seems to be whether it is an original or a commercial reprint. It doesn't look like there was actual intent to deceive.
Bruce did change the listing to note the controversy, but the note was less than Crowzilla asked for. It appears to be a pissing contest on which expert to accept IMO. Since I don't collect in this area, I have no further opinion.