Just as a datapoint in the beginning of January I had one stay at a Fairmont and one stay at a Swissotel. At check-out I specifically asked both times whether the stay would post and was told not to worry. Neither stay posted. That was the bad news. The good news: When I contacted customer service through the online form with a copy of my receipt, they reacted immediately and it took less than 24 hours for the points to post.