Who's to say that this won't happen at the Monday press conference? We all know by now to take official/OS announcements with a pinch of salt...e,g, the 'holding' announcement about Wotte taking over. It gives the impression that everything is under control.
There again, if my theory holds any water (which they rarely do) why announce Poortvliet leaving on Friday? Even if he left (or got pushed) on Friday....why not leave the announcement until Monday anyway...?
Nothing adds up. Not even 2+2