Who knows with Stringreen-he has gotten many things oddly wrong before such as referring to his own cartridge as an Ortofon "Windfield" despite being advised hundreds of times it is "Windfeld".
But perhaps he is referring to a rumor that went around that VdH cartridges had poor QC as to stylus alignment which I believe started with a blurb by Fremer in his monthly column toward his end at Stereophile. Fremer did not specifiy he was talking about VdH but his wording and the attached photo strongly hinted that the subject of his "public service announcement" was VdH.
IMO, Fremer was never much a fan of VdH. I talked to him about it briefly at Axpona 2019. His response as to how he felt about VdH was "how can anyone talk about VdH when you never know what you will get? Every cartridge sounds so different?".