I recently applied for the FB Platinum Amex (NL) in order to get the Platinum for 2 for a friend. They said it would take 2 weeks to upgrade her status after the request was done and it was sorted.

Before I was able to call FB in order to have them speed up the request, that did not seem possible nowadays.

One change is however, that only once per year you can change who receives the Platinum for 2 benefit; before - in theory - there was no writer rule (which is what the other posters have also understood from Amex).