Simon's retelling is more compact but it also invites anthropomorphization of the sharing of the familiarity with the message board which re-emerged a few times.
Zvi's retelling handles this better. Zvi speculates that the secret message board familiarity was carried because it had been trained into the May-and-subsequent models: https://thezvi.substack.com/p/openai-trained-its-models-for-...
Seems like an artifact of the subagent pattern which is explicitly included in recent models.