That does not accord with my experience in October. I did not get a room upgrade (was told once occupancy is above a certain level they don't ugrade F&F - so it's still possible). But I did get a gift of fruit & tea and a 4pm late checkout. In fact the late c/o was proactively offered before I even asked.

The treatment I received is also the official IC line on how Ambs should be treated on F&F. (See that thread for confirmation.)