I don't know anything about how executives get hired. But supposedly this all happened between Friday night and Monday morning. This isn't a simple situation; surely one man working through the weekend can't decide to set up a new division, and appoint two poached executives to head it up, without consulting lawyers and other colleagues. I mean, surely they'd need to go into Altman and Brockman's contracts with OpenAI, to check that the hiring is even legal?
That's why I think this has been brewing for at least a week.