pba: you are initially correct. There was a three month delay before the final email. I later got a hold of internal OU documents that attest that there was serious debate between Rav Belsky and Rav Schachter during that time whether or not to withdraw the hechsher from Thomas English Muffins. The motive of Shishim seems logical to me, and was the issue they discussed. The small size is ridiculous, as the dough mixed is huge, and that would be the issue.
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